title: CakePHP Show Validation Message on Hidden Field
body: <p>In my form I've created a hidden field:</p>
  
  <pre><code>echo $this-&gt;Form-&gt;hidden('editor_rating', array('value' =&gt; 0)); 
  </code></pre>
  
  <p>Which outputs:
      </p>
  
  <p>In my model I've created a validation rule:</p>
  
  <pre><code>'editor_rating' =&gt; array(
                      'rule'    =&gt; array('comparison', 'greater or equal', 1),
                      'message' =&gt; 'Please choose a valid Editor Rating'
      )
  </code></pre>
  
  <p>When I submit the form the hidden field has an error class added, but no visible change and no error message:</p>
  
  <pre><code>&lt;input id="ListingEditorRating" class="form-error" type="hidden" value="0" name="data[Listing][editor_rating]"&gt;
  </code></pre>
  
  <p>How can I make this error message visible or even attach it to a different div?</p>