Problem with Yii syntax for HTML <ul>,<li>,<a> tag

I wanna just output like:

<div class="mainmenu">

<ul id="menu">

<li><a href="#">About Us</a>

<ul><li><a href="#">Mail</a></li><li><a href="#">Facebook,Twiter</a></li>

</ul></li>

<li><a href="#">Services</a></li>

<li><a href="#">Contact us</a></li>

</ul>

</div>

What should be the standard syntax in Yii.

Please help. Thanks in advance.

You’ll probably want to use the CMenu widget.