The Problem: You have certain pages that you want to load through SSL, but you want to continue using CodeIgniter’s URL helper.
The Answer: HTTPS Routing with mod_rewrite
We’re going to use mod_rewrite to specify entry and exit points for areas of our application that need SSL encryption. When a user hits an entry point, every link created with a URL Helper function will point to an encrypted URL until the user hits an exit point. Important Note: Your base_url must be set to “/” in your config file. This code will live in your .htaccess file.
An entry:
RewriteCond %{SERVER_PORT} 80
RewriteCond %{REQUEST_URI} controller/function
RewriteRule ^(.*)$ https://www.yourdomain.com/controller/function[R=301,L]
An exit:
RewriteCond %{SERVER_PORT} !80
RewriteCond %{REQUEST_URI} controller/function
RewriteRule ^(.*)$ http://www.yourdomain.com/controller/function[R=301,L]
Duplicate the code for various entry and exit points.