Left outside Join in Code Igniter

So here's the question: I'm not sure how to write on code igniter; I read an article about it here, thus I want to insert my "And" statement before the where. The query works, but I'm not sure what the syntax is in code igniter. Thank you in advance for any assistance.

Code:

Select c.c_id, c.c_name, p.phone_no FROM Company AS c
LEFT OUTER JOIN Phone AS p
ON p.p_flex_id=c.c_id
AND p.g_id'='1' AND p.ct_id='3'
WHERE 1