Migration from Wordpress to CodeIgniter

1. Add MY_url_helper.php to CI_directory/application/helpers

2. If the CI app is already built, convert any references to *site_url* in your CI application (aside from the system directory) to the new namespaced function, ci_site_url.
This step prevents Wordpress' site_url function from overwriting CIs. Because both functions are global and CI checks to make sure that site_url has not been set. Once we load the WP bootstrap file, it will have been defined, so CI's function wll never load.

3. Add Wordpress' bootstrap file into CI_directory/index.php right above CI's bootstrap file.

4. Update wp-includes/load.php *(this is necessary if you are using CI's sessions - Wordpress mangles CI's cookies using with magic quotes.