/**
  * Handle Ajax toggle menu items.
  *
  * Related action hooks:
  * - wp_ajax_toggle_menu
  *
  * @since  1.0.0
  */
 public function ajax_action_toggle_menu()
 {
     $msg = MS_Helper_Settings::SETTINGS_MSG_NOT_UPDATED;
     $isset = array('item', 'value');
     if ($this->verify_nonce() && self::validate_required($isset, 'POST', false) && $this->is_admin_user()) {
         $item = $_POST['item'];
         $res = false;
         if (lib3()->is_true($_POST['value'])) {
             $res = MS_Model_Pages::create_menu($item);
         } else {
             $res = MS_Model_Pages::drop_menu($item);
         }
         if ($res) {
             $msg = MS_Helper_Settings::SETTINGS_MSG_UPDATED;
         }
     }
     echo $msg;
     exit;
 }