Custom Slicer

Hi, 

I might need to change the structure of my dataset but before I do, I'd like to know if I can create a custom slicer based on multiple columns. Here is how my dataset is currently structured and what I'd like the slicer to do.

I'd like the slicer to separate each 3 columns into one option as displayed above. Is there a way to do so or I should restructure my dataset instead and have a new column called category that would distinguish what column is bag or bank for example.

Thank you.