Atypical item design in a menu

I have a client who wants a special menu on some pages of his website.
All items in menu are white text on green background except one. This special item has specifically shaped grey background, special font and green color. You can see attached image for details.
I will need two menus on this website: one for "some pages" and the other for rest of the pages. My question is, if there is an easy way to edit the outfit of special menu (as you can se on image)?
Thank you.