public function clearMenuCache()
 {
     if (sfSympalContext::hasInstance() && ($menu = $this->getMenu())) {
         return sfSympalContext::getInstance()->getService('menu_manager')->clearCache($menu->getCacheKey());
     } else {
         return false;
     }
 }
 public function postSave($event)
 {
     if (sfSympalContext::hasInstance()) {
         return $this->clearMenuCache();
     }
 }