RewriteRule index/122/123/12\.html$ index.php?id=122&jk=123&lo=12 [L]
RewriteRule index/([0-9]+)/([0-9]+)/([0-9]+)\.html$ index.php?id=$1&jk=$2&lo=$3 [L]
$url = index/122/123/12.html;
$newurl = RewriteRuleInverse($url)."&lg=".$lg
$newurl == index.php?id=122&jk=123&lo=12&lg=21