Filtering Plugin or PHP script code


I look for a Plugin which can sort Data ( countrys, city ) directly on the Website.

Same like this.

When i click on the right country should open the Subdomain.

It is better a PHP Script for a fast and stable search result,
or you know a plugin for that?

Thx for every Idea


Please, contact me via the following link then we can discuss the details and the price for the work: