title: wordpress wp_nav_menu hide empty categories
body: <p>im am searching for a way to hide empty categories from a custom menu in wordpress?</p>
  
  <p>I have build a massive hierarchy and now i am going to fill the categories one after one. But until I have put a post in it, I want to hide it from the menu.</p>
  
  <p>Seems that I need something similar like <code>hide_empty=1</code> for "wp_list_categories" but now for "wp_nav_menu".</p>