Ignore media url on PHP

Is there any way to ignore all url that contains media? I'm using this line:

preg_match_all("/((?:http|https):\/\/(?:www\.)*(?:[a-zA-Z0-9_\-]{1,15}\.+[a-zA-Z0-9_]{1,}){1,}(?:[a-zA-Z0-9_\/\.\-\?\&\:\%\,\!\;]*))/", $content, $matches);

So, I need to ignore this links (and all media type):

http://ift.tt/1RHJGes 

http://ift.tt/1XL1Wun

http://ift.tt/1RHJyf0

...

Thanks in advance