Hello Dear, I've read requirements of your project and I can customize and add some features in your existing PHP and CI as per your expectations. Let's have a chat to finalize it. What kind of customization you need in your existing website?
We have worked with top companies and brands. Have a look at our recent work,
https://www.freelancer.com/u/junkyfunky
We have more than 10 years of experience in designing and development of Portals, Websites, E-commerce stores, Mobile Applications, etc.
Thanks,
Faizan