Open safari browser
Go to bookmarks
Choose your site to edit it
Enter the new name of site and the link ex: www.facebook.com and choose done
Back to your home screen and press two times on your Home button and remove "Safari"
Open safari again and see the Facebook icon :) If it doesn't work with you try again and remove safari by clicking two times on your home button Thank you all :)
The creator of this guide has not included tools