Add missing functionality to the native wp_nav_menu() function!
With this plugin you can now use the following options in addition to the default options of
wp_nav_menu:
level : (integer) (required for this plugin to work) The level of the navigation menu to show. If no child_of parameter is passed, it shows all the items of this level
child_of : (string|integer) (optional) Either the title or menu item ID of the parent in the menu whose direct children are to be shown
Sample Usage
$defaults = array(
'theme_location' => 'main_menu',
'level' => 2,
'child_of' => 'About Us',
);
wp_nav_menu( $defaults );