On his blog today, Hasin Hayder has a quick tutorial on using one of the features of the CodeIgniter framework outside of it - the ActiveRecord library.

CodeIgniters ActiveRecord library is a nice implementation (though modified) of ActiveRecord design pattern. It comes bundled with CodeIgniter. So if you want to use Just this library in your application individually instead of using full CodeIgniter framework, what to do?

His solution uses an abstraction layer (ActiveRecordFactory) to handle any issues with interfacing to CodeIgniter's class. He's also included the code (and a download