Integration header/menu sur prestashop

MUST KNOW PRESTASHOP AND OK WITH SVN.

Currently our header/menu is like this : [URL visible pour les membres Pro]
We'd like to get to this result (see attached doc).

The hovering behaves exactly the same on all 4 items (Téléphone, Tablette, Laptop, Smartwatch).

On hover, Icon + title becomes yellow and there is yellow line underlining the two.

The dropdown is always separated in 2 big parts :
part 1 : Utilisez vos propres photos et designs (customize with your photos)
part 2 : Choisissez le design de l’un de nos 3 000 artistes (customize with artist's designs)

"part 1" will be made up of big title + text + 1 image + call to action
"part 2" will be made up of big title + 3 images + 3 titles + call to action
(Icons to be sent).