surat/frontend/modules/hospital/views/register/external-update.php

<?php

$this->title = 'ลงทะเบียนงาน External (N)';
?>

<?= $this->render('_form_external', [
    'model' => $model,
    //'tmp_immono_staining' => $tmp_immono_staining,
    //'tmp_histo_staining' => $tmp_histo_staining,
]) ?>