public function view($user_id = NULL)
 {
     if ($user_id == NULL) {
         $user = unserialize($this->session->userdata('user_obj'));
     } else {
         if (is_numeric($user_id)) {
             $user = User::getUserById($user_id);
             if ($user == NULL) {
                 parent::show404Error();
             }
             //On change la vue du menu
             parent::setMenuView('menu/profils_menu');
         } else {
             parent::show404Error();
         }
     }
     parent::loadHeader();
     $data = array();
     $data['user'] = $user;
     $this->load->view('profil/index', $data);
     parent::loadFooter();
 }