Hi there,
I see you are looking for a person who can help you to modify your script using codeigniter framework. I worked on more than 50 projects on freelancer.com and mostly I developed from scratch. These project were custom applications, e-commerce , blog management, event management, new theme integrations, bug fixing etc.
I can help you on this but I'd like to see the requirements first, this'll help me to estimate project correctly.
Thanks
Mohit