im using 1.3.8 , im wondering as im new to this, is there a way to have clickable buttons instead of text for each categorie in the side box

i.e...

boots <-- instead of clickable text it is a button image
shoes <-- instead of clickable text it is a button image
vans <-- instead of clickable text it is a button image

e.t.c...

thanks for any help.