breadcrumbs and url

How to generate urls based on navigation of breadcrumbs , Iam using rails3.0.9 ruby 1.8.7 for breadcrumbs acts_as_tree plugin and nifty_generators gem
breadcrumbs are created for zone nested table that has country, zone, region.
i got a breadcrumb supply_type >> country >> region

city where supply type is another model, got to generate the url as

**	/<supply


for ex:

we want all the supply type in all country for example in all uk