Compiling Codeigniter Project

[eluser]Bart v B[/eluser]
I don't know exactly what you mean but i think you mean that clients can't read youre code.
(encryption)

Zend Guard does that: http://www.zend.com/en/products/guard/
And ioncube: http://www.ioncube.com/
the last one that i found: http://www.php-locker.com/

I don't think there is an freeware product.