maxautoricambi

Good Morning, I am creating a website for spare parts starting from the original theme of Prestashop but I need to make some changes. The reference site is http://maxautoricambi.com The changes I would make are: - Below the slideshow are the products (new arrivals - popular). I want to replace the products with some categories of my choice (eg brands of cars - audi - alfa romeo ...) where I have to change? - In the dropdown menu horizontal main (MARCHE DI AUTO PEZZI DI RICAMBIO CHI SIAMO CONTATTACI) I need categories are displayed only up to the second subcategory. example: 1. MARCHE DI AUTO 2 AUDI 3 A4 3.a A4 Avant (8E5, B6) 04.2001 3.b A4 (8D2, B5) 11,994 MUST BECOME 1. MARCHE DI AUTO 2 AUDI is misleading the menu with too many sub-categories. Tips? thanks