How to catch url? [SOLVED]

[eluser]solid9[/eluser]
I already solved this problem.
Here is the new modified controller that works.

Code:

//redirect to specific page depending on the menu selected by the user.
function menu_selector($str) {
  $username = $this->session->userdata('username');
  $this->data['header_message'] = '';
     $this->data['header'] = $this->load->view('header', $this->data, TRUE);
  $this->data['member_menu'] = $this->load->view('member_menu', null, TRUE);
     $this->data['midnav'] = $this->load->view('body_m_frontpage', $this->data, TRUE);  
  
  $string = uri_string($str);
  if($string == "main/menu_selector/home") { //redirect to index page
   //$this->index();
   echo 'Home page';
      $this->load->view('front_page', $this->data);
  } elseif($string == "main/menu_selector/post") { //redirect to post page
   echo 'Post page';
      $this->load->view('front_page', $this->data);  
  } elseif($string == "main/menu_selector/edit") { //redirect to edit or delete page
   echo 'Edit page';
      $this->load->view('front_page', $this->data);  
  } elseif($string == "main/menu_selector/msg") { //redirect to message/inbox page
   echo 'Message page';
      $this->load->view('front_page', $this->data);  
  } else {
  
  }
}

Often the echo is very helpful.