Vertical Menu Issue

I want to create vertical menu below the logo and search bar.in this Manu I create categories like dogs,cats,brids,fishes etc in the section who already show of category ,

I try create mega menu (using menu building option) of category but fails may be WPbakery editor option not show in the mega mune as front page home 02 show,

Please do it and also guide me for how can I do it.