I need to provide some custom menu items in a plugin. I mean people can go to dashboard > appearance > menus and add this custom menu item to any menu location.
So I want to know how to add the meta box in that page, how to fill it with options and how to output the content in the front end.
I tried searching for long but I'm not finding any good resource on how to manage such a thing.
Any help? Any links? Thank you.