voceplatforms

Jeff Stieler

csloisel

This plugin adds Menus themselves as an item you can put in other Menus as placeholders representing their contents.
When a Menu containing other Menus as items is rendered, the “submenu” item is expanded out into all of its items.

Voce Submenu Items

Nest menus as items to avoid giant navigation menus in your admin.

adamschoenemann

Usage
Simply install and then find the widget in Appearance->Widgets

Collapsible Pages Widget

Wordpress plugin that provides a widget that lists pages in a collapsible list

Voce Submenu Items vs Collapsible Pages Widget