Plugin System - rakeshraushan/CodeIgniter-1 GitHub Wiki
For my own CMS I created a custom plugin system. This will not be interesting for projects, where the developer is also the user.
Installing
Before you can use the plugin system, you have to edit a few files in your CodeIgniter installation. The complete source is in my own repository. You can see what I've modified with the original CodeIgniter here.
Using the Plugin System
So, if you have installed the Plugin System, it'll be useless until you fire some events:
// Coming Soon
Creating a Plugin
I have created a Gist, which shows an very well commented example plugin. You should be able to create your own one with the comments' information.