public function ajaxGetAnimalTypeAction()
 {
     $this->view->layout()->disableLayout();
     $this->_helper->viewRenderer->setNoRender(true);
     $animal_id = $this->_getParam('animal_id');
     $objPrivilege = new Security_Model_SystemMapping();
     $subgroups = $objPrivilege->getAnimalTypeArray($animal_id);
     echo Zend_Json::encode($subgroups);
 }