Marcus Downing

Add the option for a third column on the Edit Post and Edit Page screens. This is useful if you have a lot of boxes on your edit screen, from custom taxonomies and plugins.
Also adds a pair of mini columns underneath the edit boxes, giving you space for more small boxes.

Third Column

Спасибо создателю плагина. В одно нажатие задача решается этим плагином.
Есть минус: в начале кода плагина идут 2 пустых символа, что вызывает ошибки на сайте. Зайдите в код плагина и удалите их.



Делаем 3 колонки в админке при публикации записи

Adds a third column on the Edit Post screen.

chrisnowak

Ever get tired of seeing the same menu options you literally never use? Or setting up a WordPress install for a client, and want to get rid of the stuff they don’t use, or would screw up if they could?
Us too. So we made this handy little plugin that gives you little checkboxes next to each menu item and sub-menu item, even for other plugins! Just uncheck the items you don’t want to see anymore, and they’re gone! When you need them again, just recheck and they’re back! No editing core files, and being over-written upon upgrade.

Simple Admin Menu Editor

Easily and Simply show and hide what is in your admin nav. That's it.

Third Column vs Simple Admin Menu Editor