How to split Bitrix dropdown menu into columns?

Question

css

Hello. There is such an example kupeteka.ru : A

drop-down list from the top menu is implemented through several uland By its analogy, you need to make a menu on the site under Bitrix. It turns out that items are just names, without url. And sub-items are sections of the directory themselves. Not the first day I sit with this task. At first I thought to do it through classes. But there the class is assigned immediately to the entire list of sub-items. And I need to display several lists in one drop-down menu. Can you tell me the best way to implement this? display: table-cell