CodeIgniter is a powerful PHP framework with a very small footprint, built
for developers who need a simple and elegant toolkit to create
full-featured web applications. 1: Overwrite SDK files
You need the updated CodeIgniter files from the system/ directory. To do
so, you can't simply copy/paste the folder. You will need to remove it (it
would be a good idea to first do a backup just in case) and then copy the
new one to the same destination. 2: Update Classes Names
For this step all you have to do is to rename the CodeIgniter files...