Translation as in Laravel

Hi everyone, I did such a translation of files as in Laravel. You can see how I do a deal, someone can tell you how to do it better.

I created a library and in it I connect files in .json format

PHP Code:

class Language {

    protected $CI;
    public $deft_lang;
    public $json;
    public $patch;

    public function __construct()
    {
        $this->CI =& get_instance();
        $this->CI->load->helper('lang');
        $this->CI->load->helper('cookie');
        $lan = substr($this->CI->config->item('language'), 0, 2);
        $this->deft_lang = (get_cookie('lang') != $lan) ? get_cookie('lang') : $lan;
        set_cookie('lang', $this->deft_lang,93062220);
        $this->patch =  APPPATH.'/lang/'.$this->deft_lang.'.json';
        if(file_exists($this->patch))
        {
            $json = file_get_contents($this->patch);
            $this->json = json_decode($json, true);
        }
    }
    public function search($message,$par = NULL)
    {
        if(!empty($this->json))
        {
            if (array_key_exists($message, $this->json))
                $mes = $this->json[$message];
            else $mes = $message;
        }
        else $mes = $message;

        return str_replace("%%s%%", $par, $mes);
    }
} 


after that I loaded the language helper.php helper through autoload.php and take the following

PHP Code:

function __($mess, $var = '')
{
    $lang = new Language();
    return $lang->search($mess,$var);
} 


and in the template it looks like this

Code:

<h1><?php echo __('Welcome to CodeIgniter!');?></h1>

but with the parameter

Code:

<p><?php echo __('If you are exploring CodeIgniter for the very first time, you should start by reading the %%s%%.','<a href="user_guide/">'.__('User Guide').'</a>');?></p>

I am very confused that I, in the helper, at each function call creates a class can somehow be different. I just did as I know, but I'm sure you can do a lot better.

and here is the .json file

Code:

{
    "Welcome to CodeIgniter!": "Добро пожаловать в CodeIgniter!",
    "The page you are looking at is being generated dynamically by CodeIgniter.": "Страница, которую вы просматриваете, динамически генерируется CodeIgniter.",
    "If you would like to edit this page you'll find it located at:": "Если вы хотите отредактировать эту страницу, вы найдете ее по адресу:",
    "The corresponding controller for this page is found at:": "Соответствующий контроллер для этой страницы находится по адресу:",
    "If you are exploring CodeIgniter for the very first time, you should start by reading the %%s%%.": "Если вы впервые исследуете CodeIgniter, вам следует начать с чтения %%s%%.",
    "User Guide": "Гид пользователя"
}