This will help you understand better:
http://monicaquen.com.sg/

On the left: Menswear, Womenswear, Accessories should not be clickable.

There is no link to root of catalog, so it isn't much an issue. Then again, unless the user enters the URL directly, i.e. http://monicaquen.com.sg/catalog but I'm sure very few people would do that, if not none.