Hey,
I've checked Stackoverflow and found this question/discussion: http://stackoverflow.com/questions/98852/wysiwyg-text-editor-for-webpage
Important:
However, I'm looking for something that comes with special "administration panel" -> So it behaves more like CMS (in backend mode).
I'm rewriting other's programmer code which is pretty much uncommented (He'll burn in Hell for That), and I need something very simple, so I install some backend onto hosting, plus add function or include to code and place the text-specific codes into website code.
Thanks' soo much for your answers.
Edit: PHP and MySQL required.