/*

I have 3 tables. Users, Topics and Quotes. Here is my tables and columns:

users
------
user_id
email
username

topics
------
topic_id
topic_name

quotes
------
quote_id
quote_name

mix_table
---------
user_id
topic_id
quote_id

    $this->db->from('users');
    $this->db->join('quotes', 'quotes.quote_id = mix_table.quote_id');
    $this->db->join('topics', 'topics.topic_id = mix_table.topic_id');