I think if you're going to get that specific, then you need to overhaul the whole site and have sub-categories of sub-categories of sub-categories of the main categories. For instance you'd click Body & Soul and then get a list of sub headings such as Haircare, Personal Hygiene, Fashion Advice, Relationships etc. etc. ad. inf. And then clicking on Haircare (for instance) would bring up another list, like Dying, Styling, Washing etc.
It's either this, or keep the categories very all-encompasing, much like they already are. Except Parenting.