[John Lester]

You can change the layout of the columns yourself without any code modification.

ACP -> vBulletin CMS -> Grid Manager - Add new grid

Name the grid whatever you want.

The "columns" drop down menu select 3 columns 25 50 25 and click save.

Then click on "Layout Manager" ( ACP -> vBulletin CMS -> Layout Manager)

Click on "add new layout" and select the newly created 25 50 25 layout and click the save button.