Sir we have a very good expertise is Codeignitor and we have done many projects in Codeignitor, We have already build customize admin panel like Wordpress using codeignitor from there you can easily manage frontend like adding SEO related things, managing sliders, menus, contents, gallery and even edit the frontend code from the admin panel. If you want we will show you demo. We are interested in your project so kindly accept our proposal or give us a chance to discuss further. We are online and waiting for your ping in our message box.