[eluser]Michael Wales[/eluser]
It's showing the PHP "image" because you are in the View mode - switch to Code view and you will see what is actually going on.
Honestly, I wouldn't migrate away from CI. I'm not trying to hurt any feelings, but it sounds like what you asked for is a bit out of your league (in terms of modifying it yourself). I would highly suggest either: A) Contacting the person that developed your site to make changes; or B) Posting a job request on the Job forum asking for someone to assist you.
What you are seeing is fully expected - it's the way Dreamweaver is designed.