Topic: how to create a sub-menu?

hi, i want to create a sub-menu for punbb how can i do this

Re: how to create a sub-menu?

anyone know ???

orginal menu have this
<ul>
<li></li>
</ul>
but i want to make to be this

<ul>
<li>
<ul>
<li></li>
</ul>
</li>
</ul>