how to make nested side menu in ionic-framework?
<p>hi there I am trying to add a nested menu in a side menu.</p>

<p>for example please check this:</p>

<p><a href="http://codepen.io/ionic/pen/QwamEW" rel="nofollow">http://codepen.io/ionic/pen/QwamEW</a></p>

<p>when I click a menu item, the new page (new form) will open.</p>

<p>But I want to open that page in the side menu...not in a new page!</p>

<p>here is an old example that do not work with the new version.</p>

<pre><code>`http://codepen.io/mhartington/pen/mFGfj`
</code></pre>

<p>can somebody help me to do that?</p>