How to edit footer in magento?

To edit footer’s in Magento follow these steps:

For the frontend: 
appdesignfrontenddefaultdefaulttemplatepagehtmlfooter.phtml
or
appdesignfrontendyour-interfaceyour-themetemplatepagehtmlfooter.phtml

For the backend: 
(If you want to edit footer in back end):
appdesignadminhtmldefaultdefaulttemplatepagefooter.phtm
or
appdesignadminhtmlyour-interfaceyour-themetemplatepagefooter.phtm

How to remove index.php from url in magento

In Magento if you are getting the url as http://website.com/index.php/electronics/cell-phones.html and you want that index.php is not written on the url i.e. http://website.com/electronics/cell-phones.html.

Then use the following steps:

1) Login to admin section by using the URL
http://website.com/index.php/admin/

2) Then go to “System >>  Configuration >>Web >> Search Engines Optimization”
Use Web Server Rewrites : YES

3) Go to “System >>  Configuration >>Web >>Secure”
Use secure URL Frontend: YES