Codeigniter 3.x Ajax Pagination

I post because i really need help for paginate the results by category on codeigniter. When i click on the link generated, the page loads to infinity. This pagination is ok on the index page for all results. But i need paginate by category. thank you very very much in advance for you're help.

The Controler:

class Blog extends CI_Controller {
function __construct() {
    parent::__construct();
    $this->load->model(array('Blog_model'));
    $this->load->library('Ajax_pagination');   
    $this->perPage = 3;
}
    function category($category_id)//category page
{
    $data = array();

    //total rows count
    $totalRec = count($this->Blog_model->getRowsByCat($category_id));
    //pagination configuration
    $config['target']      = '#postwrap';
    $config['base_url']    = base_url().'blog/category/'.$category_id.'/ajaxPaginationCat';
    $config['total_rows']  = $totalRec;
    $config['per_page']    = $this->perPage;

    $this->ajax_pagination->initialize($config);

    //get the posts data
    $data['posts'] = $this->Blog_model->getRowsByCat($category_id,array('limit'=>$this->perPage));
    //
    $data['main_content'] = "blog/category";
    $this->load->view('template',$data);
}

    function ajaxPaginationCat($category_id){
    $page = $this->input->post('page');
    if(!$page){
        $offset = 0;
    }else{
        $offset = $page;
    }

    //total rows count
    $totalRec = count($this->Blog_model->getRowsByCat($category_id));

    //pagination configuration
    $config['target']      = '#postwrap';
    $config['base_url']    = base_url().'blog/category/'.$category_id.'/ajaxPaginationCat';
    $config['total_rows']  = $totalRec;
    $config['per_page']    = $this->perPage;

    $this->ajax_pagination->initialize($config);

    //get posts data
    $data['posts'] = $this->Blog_model->getRowsByCat($category_id,array('start'=>$offset,'limit'=>$this->perPage));

    //load the view
    $this->load->view('blog/ajax-pagination-data', $data, false);
}
The Model:

/*
* get rows from the posts table
*/
function getRowsByCat($category_id,$params = array()){
    $this->db->select('*');
    $this->db->from('blog_posts');
    $this->db->order_by('post_id','desc');

    if(!empty($category_id)){
        $this->db->where('category_id',$category_id);
    }

    //set start and limit
    if(array_key_exists("start",$params) && array_key_exists("limit",$params)){
        $this->db->limit($params['limit'],$params['start']);
    }elseif(!array_key_exists("start",$params) && array_key_exists("limit",$params)){
        $this->db->limit($params['limit']);
    }
    //get records
    $query = $this->db->get();
    //return fetched data
    return ($query->num_rows() > 0)?$query->result_array():FALSE;
}
Library:

<?php  if (!defined('BASEPATH')) exit('No direct script access allowed');
/** * Pagination Class * * @package CodeIgniter * @LinK http://codeigniter.com/user_guide/librar...ation.html * * Modified by CodexWorld.com * @Ajax pagination functionality has added with this library. * @It will helps to integrate Ajax pagination with loading image in CodeIgniter application. * @TutorialLink http://www.codexworld.com/ajax-paginatio...framework/ */ class Ajax_pagination{

var $base_url        = ''; // The page we are linking to
var $total_rows      = ''; // Total number of items (database results)
var $per_page        = 10; // Max number of items you want shown per page
var $num_links      =  2; // Number of "digit" links to show before/after the currently viewed page
var $cur_page        =  0; // The current page being viewed
var $first_link      = 'First';
var $next_link      = '»';
var $prev_link      = '«';
var $last_link      = 'Last';
var $uri_segment    = 3;
var $full_tag_open  = '<div class="pagination">';
var $full_tag_close  = '</div>';
var $first_tag_open  = '';
var $first_tag_close = '&nbsp;';
var $last_tag_open  = '&nbsp;';
var $last_tag_close  = '';
var $cur_tag_open    = '&nbsp;<b>';
var $cur_tag_close  = '</b>';
var $next_tag_open  = '&nbsp;';
var $next_tag_close  = '&nbsp;';
var $prev_tag_open  = '&nbsp;';
var $prev_tag_close  = '';
var $num_tag_open    = '&nbsp;';
var $num_tag_close  = '';
var $target          = '';
var $anchor_class    = '';
var $show_count      = true;
var $link_func      = 'getData';
var $loading        = '.loading';

/**
* Constructor
* @access    public
* @param    array    initialization parameters
*/
function CI_Pagination($params = array()){
    if (count($params) > 0){
        $this->initialize($params);       
    }
    log_message('debug', "Pagination Class Initialized");
}

/**
* Initialize Preferences
* @access    public
* @param    array    initialization parameters
* @return    void
*/
function initialize($params = array()){
    if (count($params) > 0){
        foreach ($params as $key => $val){
            if (isset($this->$key)){
                $this->$key = $val;
            }
        }       
    }

    // Apply class tag using anchor_class variable, if set.
    if ($this->anchor_class != ''){
        $this->anchor_class = 'class="' . $this->anchor_class . '" ';
    }
}

/**
* Generate the pagination links
* @access    public
* @return    string
*/   
function create_links(){
    // If our item count or per-page total is zero there is no need to continue.
    if ($this->total_rows == 0 OR $this->per_page == 0){
      return '';
    }

    // Calculate the total number of pages
    $num_pages = ceil($this->total_rows / $this->per_page);

    // Is there only one page? Hm... nothing more to do here then.
    if ($num_pages == 1){
        $info = 'Showing : ' . $this->total_rows;
        return $info;
    }

    // Determine the current page number.       
    $CI =& get_instance();   
    if ($CI->uri->segment($this->uri_segment) != 0){
        $this->cur_page = $CI->uri->segment($this->uri_segment); 
        // Prep the current page - no funny business!
        $this->cur_page = (int) $this->cur_page;
    }

    $this->num_links = (int)$this->num_links;
    if ($this->num_links < 1){
        show_error('Your number of links must be a positive number.');
    }

    if ( ! is_numeric($this->cur_page)){
        $this->cur_page = 0;
    }

    // Is the page number beyond the result range?
    // If so we show the last page
    if ($this->cur_page > $this->total_rows){
        $this->cur_page = ($num_pages - 1) * $this->per_page;
    }

    $uri_page_number = $this->cur_page;
    $this->cur_page = floor(($this->cur_page/$this->per_page) + 1);

    // Calculate the start and end numbers. These determine
    // which number to start and end the digit links with
    $start = (($this->cur_page - $this->num_links) > 0) ? $this->cur_page - ($this->num_links - 1) : 1;
    $end  = (($this->cur_page + $this->num_links) < $num_pages) ? $this->cur_page + $this->num_links : $num_pages;

    // Add a trailing slash to the base URL if needed
    $this->base_url = rtrim($this->base_url, '/') .'/';

    // And here we go...
    $output = '';

    // SHOWING LINKS
    if ($this->show_count){
        $curr_offset = $CI->uri->segment($this->uri_segment);
        $info = 'Showing ' . ( $curr_offset + 1 ) . ' to ' ;

        if( ( $curr_offset + $this->per_page ) < ( $this->total_rows -1 ) )
        $info .= $curr_offset + $this->per_page;
        else
        $info .= $this->total_rows;

        $info .= ' of ' . $this->total_rows . ' | ';
        $output .= $info;
    }

    // Render the "First" link
    if  ($this->cur_page > $this->num_links){
        $output .= $this->first_tag_open
                . $this->getAJAXlink( '' , $this->first_link)
                . $this->first_tag_close;
    }

    // Render the "previous" link
    if  ($this->cur_page != 1){
        $i = $uri_page_number - $this->per_page;
        if ($i == 0) $i = '';
        $output .= $this->prev_tag_open
                . $this->getAJAXlink( $i, $this->prev_link )
                . $this->prev_tag_close;
    }

    // Write the digit links
    for ($loop = $start -1; $loop <= $end; $loop++){
        $i = ($loop * $this->per_page) - $this->per_page;   
        if ($i >= 0){
            if ($this->cur_page == $loop){
                $output .= $this->cur_tag_open.$loop.$this->cur_tag_close; // Current page
            }else{
                $n = ($i == 0) ? '' : $i;
                $output .= $this->num_tag_open
                    . $this->getAJAXlink( $n, $loop )
                    . $this->num_tag_close;
            }
        }
    }

    // Render the "next" link
    if ($this->cur_page < $num_pages){
        $output .= $this->next_tag_open
            . $this->getAJAXlink( $this->cur_page * $this->per_page , $this->next_link )
            . $this->next_tag_close;
    }

    // Render the "Last" link
    if (($this->cur_page + $this->num_links) < $num_pages){
        $i = (($num_pages * $this->per_page) - $this->per_page);
        $output .= $this->last_tag_open . $this->getAJAXlink( $i, $this->last_link ) . $this->last_tag_close;
    }

    // Kill double slashes.  Note: Sometimes we can end up with a double slash
    // in the penultimate link so we'll kill all double slashes.
    $output = preg_replace("#([^:])//+#", "\\1/", $output);

    // Add the wrapper HTML if exists
    $output = $this->full_tag_open.$output.$this->full_tag_close;
    ?>
    <script>
    function getData(page){ 
        $.ajax({
            method: "POST",
            url: "<?php echo $this->base_url; ?>"+page,
            data: { page: page },
            beforeSend: function(){
                $('<?php echo $this->loading; ?>').show();
            },
            success: function(data){
                $('<?php echo $this->loading; ?>').hide();
                $('<?php echo $this->target; ?>').html(data);
            }
        });
    }
    </script>
    <?php
    return $output;
}

function getAJAXlink($count, $text) {
    $pageCount = $count?$count:0;
    return '<a href="javascript:void(0);"' . $this->anchor_class . ' onclick="'.$this->link_func.'('.$pageCount.')">'. $text .'</a>';
}
} // END Pagination Class

And the Ajax generated:

                    <script>
    function getData(page){ 
        $.ajax({
            method: "POST",
            url: "blog/category/1/ajaxPaginationCat/"+page,
            data: { page: page },
            beforeSend: function(){
                $('.loading').show();
            },
            success: function(data){
                $('.loading').hide();
                $('#postwrap').html(data);
            }
        });
    }
    </script>
thank you so much!