Creare a Link with tag and category

I have a list of product that have the same tags, but different categories.

For example: the tag "Spain" has two categories. So my list is:

Category 1 --- 3 products
Category 2 --- 1 product

When I click in Category 1 I want to display it to an other page showing something like this:

Category 1
Product 1
Product 2
Product 3

How I create this link to pass the category and the current tag?

Any idea?

via Chebli Mohamed