url rewrite for dynamic category page using htaccess

http://shikshaadhar.com/category.php?category=institutes

to

http://shikshaadhar.com/colleges.html

Sample code below:

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteRule ^([^/]*)\.html$ /category.php?category=$1 [L]
</IfModule>

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