HiThere have been some discussions in debian-legal about CodeIgniter's license in the past [1][2].
I was pleased to read that CodeIgniter 3.0 was released under an MIT license [3] on 2015-03-30.
Regards Graham [1] https://lists.debian.org/debian-legal/2008/10/msg00048.html [2] https://lists.debian.org/debian-legal/2010/10/msg00036.html [3] http://www.codeigniter.com/user_guide/license.html