How to use WordPress Custom Menu?

I want to make the menu item static ( delete the link ) and keep the links only for the subitems. I tried to cusrum the functions to make this happends but still i get no results. can you help

I didn’t quite get your question, however, every aspect related to menu can be controlled via Appearance – Menus.
You can arrange menu items in various different ways using drag & drop functionality. Here is a nice instructions on how to use WordPress Custom Menu: