Apache htaccess rules

I have a website in Joomla where the links redirect to external links. I want the links to be appearing as sub sites for the main site. Let us say the main site is [login to view URL] - Link to United States will show [login to view URL] on the URL but will actually redirect to [login to view URL] Link to Ireland will show mydomain/ie on URL but will take to [login to view URL] Hope this is clear. I will manage the links on Joomla. The task is to manage the links on the URL - should work on all browsers