Pure CSS Mega Menu

[MaxBodine]

Install went well. Good directions.
What I am trying to figure out is how I can display the top level categories along the top main menu. Now it comes off of Shop and I have turned off the top menus I am not using.
https://uesakausa.com Zen cart 1.5.5f

Instead of Shop on the top level I would like the top level categories, then subcats off of those.

Training | Competition | Custom Bumpers | Apparel & Access | About Us | Info | Connect then sub categories similar to this:
Bumpers Bumpers Platinum
Metal Metal Uesaka
Bars Bars
Collars

Not sure how to do this. I am assuming it is in here tpl_mega_menu.php but have no clue how to change this code without blowing it up. Couldn't find any tutorial or post. Thanks in advance for any help! Got a headache on this one.

Does anyone have a mega menu that has the top level categories in the main part and the sub categories drop down and branch out from there? Can you offer me any ideas on how to proceed?

Thanks,

Max