Is there a way to disable a vanilla menu letter?

[Brygun]

For large mods like BAC the limited number of menu letter spaces has been an issue at times.

Been a while since I was deep in this games modding language. I know there is a way to add new menu items. What Im looking for is to turn a vanilla modding letter off. In this case the "Arrow" menu contents all but the mysterious recipe for "arrow" is moved to "Fletching" menu

Thus im stuck at what is shown in the pic. The new vanilla Arrow is now alone in the [A] Arrow menu.

This is an example of collisions with updates (steam or otherwise) and large mods.

How can I turn off one of the base game menus?

(asking in another thread about the mystery of the arrow recipe not being in diy_glossary
https://www.unrealworld.fi/forums/index.php?topic=7021.0 )

[Tinker]

It would also be nice to ne able to rename base menus.