title: how to add rel to link in cakephp
body: <p>to show light-box</p>
  
  <pre><code>&lt;a href="images/image-1.jpg" rel="lightbox"&gt;
  &lt;img src="images/thumb-1.jpg" width="100" height="40" alt="" /&gt;
  &lt;/a&gt;
  </code></pre>
  
  <p>i use this code to show images in lightbox instead the above code ..</p>
  
  <pre><code>$full = '/img/images/image-1.jpg';
    $thumb = $this-&gt;Html-&gt;image('images/thumb-1.jpg');
  echo $this-&gt;Html-&gt;link($thumb,$full,array('escape' =&gt; false));
  </code></pre>
  
  <p>already i show images (thumb and full screen) but i didn't show the
  popup effect when clicked on the first image because i don't know how to add <strong>rel="light-box"</strong> to the
  link </p>