public function after_load(Model $contact)
 {
     $contact->inquiry_type_label = \Model_Contact::inquiry_type_to_label($contact->inquiry_type);
 }
<?php

$input = $fieldset->input();
?>

<div id="contentForm" class="row"> 
  <!-- form -->
  <div id="form" class="container">
    <div class="box clearfix">
      <h3>お問い合わせフォーム</h3>
      <form action="/inquiry/thanks" method="POST" class="form-horizontal">
	<div class="form-group">
	  <label class="col-sm-2 control-label">お問い合わせの種類</label>
	  <div class="col-sm-6">
	    <?php 
echo e(\Model_Contact::inquiry_type_to_label($input['inquiry_type']));
?>
	  </div>
	</div>
	<div class="form-group">
	  <label class="col-sm-2 control-label">名前</label>
	  <div class="col-sm-6">
	    <?php 
echo e($input['last_name']);
echo e($input['first_name']);
?>
	  </div>
	</div>
	<div class="form-group">
	  <label class="col-sm-2 control-label">件名</label>
	  <div class="col-sm-6">