This document describes how to create a multi-column menu for Joomla using T-Bootstrap Megamenu. In this document, we assume that you have downloaded the T-Bootstrap Megamenu extension and have installed it on a site of yours.
As described on the image above, when multi-colum mode is enable for a first-level menu item, each and every second-level menu items with children under the first-level menu item will be considered as a new column starter and displayed a a colum header. All the third-level menu items which are the children of a column header will reside inside the corresponding column.
Creating a multi-column menu with T-Bootstrap Mega Menu is very easy and straight-forward.
by editing an existing (or creating a new) first-level menu item with settings as below (We assume that you may want two columns and 200px/each:
Creating two menu items which are children of the first-level menu item above. These two menu items will become column headers as soon as each gets a child menu item (third-level one)
Creating third-level menu items which are children of the two second-level menu items above.
Now, you are almost done and can start playing with the parameters to tweak the extension to serve you best.