How to provide link on a submenu?
<p:submenu>
<f:facet name="label">
<p:menuitem value="Quit" url="http://www.primefaces.org" />
</f:facet>
</p:submenu>
<p:submenu>
<f:facet name="label">
<p:menuitem value="Quit" url="http://www.primefaces.org" />
</f:facet>
</p:submenu>