Something

public function accessTypesAction(){  // initialize output array, data, to be populated by foreach, below.  $data = array();		  foreach(Zend::registry('databases')->default                                     ->query("call get_access_types_list()")                                     ->fetchAll(PDO::FETCH_OBJ) as $id => $accessType)  {    $data[$accessType->id] = $accessType->description;  }								  $this->getResponse()->setBody(Zend_Json::encode($data));		}