one codeigniter application folder run two databases

@morsi,

Here is how you do multiple connections to multiple databases: https://www.codeigniter.com/user_guide/d...-databases

Then all you have to do is when you set your $DB at the top of your model use the ternary option like this
$DB = (site_url() == 'domain1')? $this->load->database('db_connection1', TRUE): $this->load->database('db_connection2', TRUE);