将url替换为所需的自定义URL

how to change my url in .htaccess file?
Example I have a url :

www.mysite.com/folder1/index.php?category=cs

I want it to appear like:

www.mysite.com/folder1/cs

any suggestions please :)

Try this:

<IfModule mod_rewrite.c>
RewriteEngine on

RewriteBase /folder1/

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.+)\/?$ index.php?category=$1 [QSA]
</IfModule>