app/themes/default/_form.phtml
<?= $form->open(); ?>
<ol class="form-fields">
<?php foreach ($form->fields() as $field): ?>
<li class="<?=$field->type?>">
<?php switch ($field->type):
case 'checkbox': ?>
<?= $form->label()->forId($field->id)->after($form->field($field->id))->addClass($field->id); ?>
<?= $form->getError($field->id); ?>
<?php break; ?>
<?php case 'radio': ?>
<?= $form->field($field->id); ?>
<?= $form->getError($field->id); ?>
<?php break; ?>
<?php case 'submit': ?>
<?= $form->field($field->id); ?>
<?php break; ?>
<?php default: ?>
<?= $form->label()->forId($field->id); ?>
<?= $form->field($field->id); ?>
<?= $form->getError($field->id); ?>
<?php break; endswitch; ?>
</li>
<?php endforeach; ?>
</ol>
<?= $form->close(); ?>