edit layered navigation to be single option select
I would like to change my layered navigation so users can only selected 1 item per drop down.
as a bonus, I would like it to behave like old style ajax menus
I have 4 different drop down menus in my layered navigation and they are all attributes. Ideally, the first drop down would cause the second drop down to populate, the second -> populate third drop down, the third -> populate fourth drop down. Is it possible to modify my layered navigation to behave this way? What files and functions could i modify to accomplish this?