Intercepting link creation

Heey everyone,
I'm pretty new to this html editor and I've got quite an interesting question, at least it is to me.
Whenever I create a link using the "insert link" button, and I, as example, insert "home" (it would look like: http://home) that it doesn't make the html be <a href="home">home</a> but it changes the href value. For example it makes it look as <a href="return page('home');">home</a>. I hope you understand my problem and even more do I hope that you can help me with this problem. All help is greatly appreciated!
Greetings,
Rieny