Codeigniter - 2-3 bugs to be fixed

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
I have a site which has been working fine in the past. Recent code changes have made the code slightly unstable, with a few bugs showing up. The earlier developer isn't producing desired results. I need someone to work on these bugs to resolve them. The changes should not be done on the live system.

Skills required:
Codeigniter, PHP, Software Architecture
About the employer:
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