I have a problem with a CMS website, that normally generates readable urls. Sometimes it happens that navigation links are shown as www.domain.com/22, which results in an error, instead of www.domain.com/contact. I have not found a solution for this yet, but the page is working if the url is www.domain.com/index.php?id=22. Therefore, I'm trying to rewrite www.domain.com/22 to www.domain.com/index.php?id=22 and I have used this rewrite rule: RewriteRule ^([1-9][0-9]*)$ index.php?id=$1 [NC] I tested it using http://htaccess.madewithlove.be and here it shows the correct result, but on the website no rewrite is happening.