配置文件中的代码点火器set_messages / set_errors_delimiters

I have a file form_validation.php in application/config/form_validation.php which content :

$config = array(

        'inscription' => array(
                array(
                    'field' => 'nom',
                    etc ..

How can I add errors delimiters or messages like

$this->form_validation->set_error_delimiters('<p class="erreur-inscription">', '</p>');           ) 
$this->form_validation->set_message('matches', 'Erreur lors de la confirmation du mot de passe');

You can do it by creating a Base controller

class MY_Controller extends CI_Controller
{
 function __construct()
 {
    parent::__construct();
    $this->form_validation->set_error_delimiters('<p class="erreur-inscription">', '</p>');           ) 
    $this->form_validation->set_message('matches', 'Erreur lors de la confirmation du mot de passe');
 }
}

and then extend this for other controller

class Main_Controller extends MY_Controller
 {
  function __construct()
   {
    parent::__construct();
    // do some session stuff here :)
   }
 }

Put this code in your Form_validation file:

$config['error_prefix']= '<div class="test-danger">';
$config['error_sufix]=  '</div>';