Thanks for quick reply.
My problem is, I don't want to use home.php any where in the site. Is it possible?
I put all code of home.php in index.php and similarly in "categories.tpl" file I also change in the url i.e. replace "home.php" with "index.php". Now main categories are coming with right url like index.php?cat=231 The problem is with subcategories and with breadcrumb. They directed toward like home.php?cat=231
Url of the website is
www.kneebracesonline.com
Thanks,
Waqar