Hide Any of the Drop Downs:

In your zen cart admin go to Configuration -> Abbington Mega

Click on "Mega Menu Quick Links", "Mega Menu Categories", "Mega Menu Shop by Brand", "Mega Menu About Us", "Mega Menu Information", "Mega Menu Contact Us", or "Mega Menu Customer Service".

Select "true" to show the drop down in the header mega menu, or select "false" to hide the drop down in the header mega menu, and click on the update button.

Navigate to your zen cart store front end and click your browsers "refresh" button to see the changes.