Menu Parent Form UI
This module provides an improved user interface for selecting parent menu items in Drupal. It transforms the single dropdown menu into cascading dropdowns, making it easier to navigate and choose parent items for large menus on node edit and menu add link forms.
A better user interface for choosing parent menu items in Drupal. This is a client-side solution that applies a hierarchical select feature to the choosing of parent menu items in Drupal.
When a menu in Drupal gets too big, the select dropdown for choosing a parent menu item becomes unusable. This module changes the single dropdown into multiple cascading dropdowns on both the node edit form and the menu add link form.
Instructions
Just enable the module, and you should see cascading/hierarchical menus for choosing parent menu items on the node edit form and when adding menus from structure > menus
Notes/Future Support
This is a client-side module that uses javascript to extract the menu levels by looking at the number of dashes at the beginning of the option text (e.g. "--About" vs "----Our History"). Drupal includes the dashes by default when printing this option list, but this approach relies on that always being the case. It will break if Drupal changes the structure of that options list in the future and removes the dashes.