How can I modify all existing tags while keeping the urls themselves?
I solved the issue with help from this answer: https://wordpress.stackexchange.com/a/159570/176615 // add nofollow to Amazon function add_nofollow_content($content) { $content = preg_replace_callback( ‘/<a[^>]*href=[“|\’]([^”|\’]*)[“|\’][^>]*>([^<]*)<\/a>/i’, function($m) { if (strpos($m[1], “amzn.to”) !== false) return ‘<a href=”‘.$m[1].'” rel=”nofollow noopener” target=”_blank”>’.$m[2].'</a>’; else return ‘<a href=”‘.$m[1].'” rel=”noopener” target=”_blank”>’.$m[2].'</a>’; }, $content); return $content; } add_filter(‘the_content’, ‘add_nofollow_content’);