Searching for non-existing property types

I have properties in the categories Hotels and Apartments. An awkward situation arises when searching : If there are no hotels in country x there is still an option to select this categorie. Is there a possibility to make this searching more dynamic?
I use the following search order Country, state, city, categorie.

In other words. If you are looking for an apartment in Slovenia, but there are only hotels, then Apartments should not be a search option.

The page I need help with: [log in to see the link]