How can I split my catalog menu into two columns?

Hello!

I want to edit main menu (header on image).

I have pop-up menu ‘‘Catalog’’ and I need to devide objects into 2 columns of 4 objects. I also want to add text above those columns like on image below .

Thank You!

@ariservice ,

Share the store URL.

@oscprofessional

https://ariservice.myshopify.com/

PW: Gstep2020