title: How to insert html code just before <input in cakephp helper
body: <p>I have this block of code in a login .ctp file:</p>
  
  <pre><code>&lt;?php echo $this-&gt;Form-&gt;create('AdmUser', array(
      'class' =&gt; 'form-vertical',
      'inputDefaults' =&gt; array(
          'label' =&gt; false,
          'div' =&gt; false,
      ))); ?&gt;
  
  &lt;?php echo $this-&gt;Form-&gt;input('login', array(
      'placeholder' =&gt; 'User')
      );?&gt;
  </code></pre>
  
  <p>I'm using <a href="https://github.com/slywalker/TwitterBootstrap" rel="nofollow">slywalker's</a> TwitterBootstrap plugin for cakephp so the output is like this:</p>
  
  <pre><code>&lt;div class="control-group"&gt;
       &lt;div class="controls"&gt;
            &lt;input name="data[AdmUser][login]" placeholder="User" maxlength="15" type="text" id="AdmUserLogin" required="required"&gt;
       &lt;/div&gt;
  &lt;/div&gt;  
  </code></pre>
  
  <p>I'm trying to put some html code just before input tag like this:</p>
  
  <pre><code>&lt;div class="control-group"&gt;
       &lt;div class="controls"&gt;
            &lt;span class="add-on"&gt;&lt;i class="icon-user"&gt;&lt;/i&gt;&lt;/span&gt;
            &lt;input name="data[AdmUser][login]" placeholder="User" maxlength="15" type="text" id="AdmUserLogin" required="required"&gt;
       &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>When i try to use <code>'before' =&gt; '&lt;span class="add-on"&gt;&lt;i class="icon-lock"&gt;&lt;/i&gt;&lt;/span&gt;'</code> the code goes between <code>&lt;div class="control-group"&gt;</code> and
       <code>&lt;div class="controls"&gt;</code></p>