Create a category that is visible for everybody but only accesible to a certain group of clients

[Anca Amalia]

Good afternoon,

 

I'm using Prestashop 1.6.0.9. I'm trying to create a products category that can only been access by a certain group of clients, but this category is visible for everybody apearing in the shop page main menu, even though if is clicked will appear a message like "Access denied. You need to login first". I've allready created a group of clients, but when you choose the option for only access corresponding to this group and not to the visitor one, this category of products desapears from the top horizontal menu of the shop...

 

Thanks in advance for your assistance.