I haven't tested or even tried practically but you can try by overriding the function and add backpath last (base) item.
The backpath column contains the parent categories path. So if it has two parents than cat1/cat2 and if it has only one parent than cat1 etc..
So you can either explode by / and get last item by using end($array) which will gives you last item of the exploded array. If you want to display every item of the backpath than just run the foreach loop to list every item of the exploded array.
I just landed back to the country so not able to add any example at the moment but will add in future if get time.
Hope this will helps you guyz