RewriteEngine On
RewriteBase /news
RewriteRule ^category/([0-9]+)$ index.php?act=category&cid=$1 [L]
RewriteRule ^category/([0-9]+)/([0-9]+)$ index.php?act=category&cid=$1&offset=$2 [L]
RewriteRule ^view/([0-9]+)/([0-9]+)$ index.php?act=view&cid=$1&id=$2 [L]
RewriteRule ^category/(.*)-(.*)$ index.php?act=category&cid=$1&afterid=$2 [L]