Page-Based Subnav
Author: Webvanta
Generates a subnav list based on the page hierarchy (not the menu hierarchy). This is designed for sites with a two-level page hierarchy.
If the current page has children (subpages), then this is a top-level page, and the subnav list shows each of subpages.
If the current page does not have any children, then presumably it is a subpage, so the subnav shows the other subpages of the same parent. The w:if_self statement adds a class to the menu item for the current page.
<ul>
<w:if_children>
<w:children:each>
<li><a href='<w:url />'><w:meta:title /></a></li>
</w:children:each>
</w:if_children>
<w:unless_children>
<w:parent:children:each>
<li><a href='<w:url />' <w:if_self>class='subnav-selected'</w:if_self>><w:meta:title /></a></li>
</w:parent:children:each>
</w:unless_children>
</ul> 
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