$disabilityType = $this->getDoctrine()->getRepository("AldenBonBundle:DisabilityType")->findAll();

$item = new AldenBonBundleEntityDisabilityType();
$item->setAsAll();//set name and id
array_unshift($disabilityType, $item);

$disabilityType = $this->getDoctrine()->getEntityManager()->merge($item);

$query = $entityManager
             ->createQuery('SELECT d FROM AldenBonBundleDisabilityType d');
$disabilityTypes = $query->getResult(Query::HYDRATE_ARRAY);