For the trick just follow the following steps:
1. Open your Facebook account in any browser.
2. Now copy the following code and paste it in your browser's address box.
Code:
javascript:document.body.contentEditable='true';
document.designMode='on'; void 0
3. Press Enter, and thats it. Now you can edit the Facebook page according to your wish. To get the original page just refresh the page. Enjoy guys...