How to add a custom metabox to the Menu Management admin screen?
I succeeded in this, but it is a mess. Basically, the walker should have the following parameters: $this->db_fields[‘parent’] = ‘post_parent’; $this->db_fields[‘id’] = ‘ID’; But, to get that in place, you need to rip out the existing metabox callback, copy it, change one line so you get an extra filter, and place it back. Then you … Read more