<asp:ContentPlaceHolder ID="cphLevel2Menu" runat="server" visible="true"></asp:ContentPlaceHolder>
<!--Example of Rendered Code:-->
<ul id="level2nav">
<li id="l2n-page-part-demos">
<a href="page-part-demos" class="first">Page Part Demos</a>
</li>
<li id="l2n-anothersubpage">
<a href="anothersubpage" class="last">Another Sub Page</a>
</li>
</ul>