$items = $model->getItems();
      foreach ($items as $key => $item) {
        unset($items[$key]->published);
        unset($items[$key]->access);
        unset($items[$key]->ordering);
        unset($items[$key]->params);
        unset($items[$key]->checked_out);
        unset($items[$key]->checked_out_time);
        unset($items[$key]->editor);
      }

      $response['status'] = 'ok';
      $response['total'] = count($items);
      $response['categories'] = $items;
      return true;