My friend was going to edit our wiki and she got a screen of html. How can she turn that off?

So what you got was a screen full of < > " " = : / [ ] and stuff? I think you're in the Classic Editor, and if you look in the upper right hand corner there should be a link called "Point and Click Editor" - if you click that, you should go back to the editor that looks like a word processor, with snappy little buttons and stuff. However, if your friend is using PBwiki on Safari, that editor won't work. You can switch to another browser, the official recommended one is Firefox (http://www.firefox.com) - it's really spiffy, and great for other things too.