将新网站版本指向旧网站

I am developing a website created in Laravel 4.

Suppose I have the following websites:

1. website1.net/landing1 - this is the current version
2. website2.net/landing2 - this is a new version
3. website3.net/landing3 - another new version

What I need are the following:

1. website1.net/landing1 - this is the current version
2. website1.net/landing2 - this is a new version
3. website1.net/landing3 - another new version

I need to point the two new versions to the current version of my website. If I type the website1.net/landing2, it should use the website2.net/landing2 without being visible to user that he is using the website2.net/landing2. I want the user to see website1.net/landing2 but it is actually website2.net/landing2. Same as the website3.net/landing3. With this, the user don't need to type the new version instead he will be typing the old version with the new landing page.

Note: I will not be editing the routes.php as well as the HomeController.php

Additional note: All of them have different databases and I am using Ubuntu 12.04

Please help me. I want to achieve this. Do I need to manipulate the .htaccess of the server? If so, what are the steps? Kindly give me the possible solution for I am not really familiar with the .htaccess rewriting. Any help and suggestions would be gladly appreciated. Thanks.