<IfModule mod_rewrite.c>
RewriteEngine on
RewriteBase /
RewriteRule ^html/list/([0-9]+)/([0-9]+)/index.html$ list.php?cid=$1&bid=$2&$3
RewriteRule ^html/read/([0-9]+)/([0-9]+)/([0-9]+).html$ read.php?cid=$1&bid=$2&id=$3&$4
RewriteRule ^html/class/([0-9]+)/([0-9]+)/index.html$ class.php?cid=$1&page=$2&$3
RewriteRule ^html/class/all/([0-9]+)/index.html$ class.php?page=$1&$2
</IfModule>