Hello,
I have visited the URL you provided. Sorry but you could not create the exact same mega menu as in the link you provided.
You can create something resembling the one for yourself using the HTML Blocks and add the HTML Block to the respective menu item from Appearance >> Menus.
Screenshot for Clarification: https://ibb.co/8r5YSBL
You can also read our detailed documentation in the following link:
https://xtemos.com/docs/woodmart/html-blocks-2/#mega_menu
Regard’s.
Xtemos Studio.