[eluser]bastones[/eluser]
As per their license terms, it states:
Quote:PERMITTED USE
You are permitted to use, copy, modify, and distribute the Software and its
documentation, with or without modification, for any purpose, provided that
the following conditions are met:
1. A copy of this license agreement must be included with the distribution.
2. Redistributions of source code must retain the above copyright notice in
all source code files.
3. Redistributions in binary form must reproduce the above copyright notice
in the documentation and/or other materials provided with the distribution.
4. Any files that have been modified must carry notices stating the nature
of the change and the names of those who changed them.
5. Products derived from the Software must include an acknowledgment that
they are derived from CodeIgniter in their documentation and/or other
materials provided with the distribution.
6. Products derived from the Software may not be called "CodeIgniter",
nor may "CodeIgniter" appear in their name, without prior written
permission from EllisLab, Inc.
...so I'm guessing in the short fall yes but with certain conditions.