Category Management

I have a price tapestry based site were I receive feeds from cj.com and linkshare. My developer made it so that I have a category section on the left side, and it takes the category info from the feed. The problem is that different merchants use different categories.

Is there a way that I, or my developer can create our own categories, and somehow map it to each individual feeds category?

For example:

Different feeds have different categories for the same product:

Feed No 1:
Non Prescription > Top Seller- Frontline

Feed No 2:

Dogs > Flea & Tick > Frontline

Feed No 3:

Medication > Fleas > Dogs > Frontline

I would like them all to fall under the category like this:

Flea & Tick > Dogs > Frontline