/**
  * @param int $id
  * @param User $record
  */
 public function handleRecord($id, $record)
 {
     $group_id = $this->grid->getRequest()->getInt('_group_id');
     if (!$group_id) {
         throw new Am_Exception_InternalError("_group_id empty");
     }
     $groups = $record->getCategories();
     if ($this->remove) {
         if (!in_array($group_id, $groups)) {
             return;
         }
         foreach ($groups as $k => $id) {
             if ($id == $group_id) {
                 unset($groups[$k]);
             }
         }
     } else {
         if (in_array($group_id, $groups)) {
             return;
         }
         $groups[] = $group_id;
     }
     $record->setCategories($groups);
 }