I like that plugin very much, it is really great. Thank you, Ján, for sharing that!
I need it to display only strictly related subitems in the sidebar.
But in case there are no such subitems the plugin still returns
<ul id="menu-customname-2" class="menu"></ul>
Is there a way to avoid this, as this creates a mess with CSS styles. The empty widget box gets some height due to the
- -tags although it's empty.