WordPress plugin to remove all bit.ly links from post content, keeping the anchor text

remove-bitly-links.php

<?php
/*
Plugin Name: Remove bit.ly links
Description: Plugin to remove all bit.ly links from post content, keeping the anchor text.
Version: 1.0
Author: Matthias Kretschmann
Author URI: http://mkretschmann.com
*/

// Filter the_content
add_filter('the_content', 'rbl_remove_bitly_links');

// Le function
function rbl_remove_bitly_links($content)
{
    // Regex, FTW!
    // Search & remove link markup for all links
    // with bit.ly, j.mp or bitly.com as href attribute
    return preg_replace('@<a[^<>]*href="(?:http://|https://)(?:bit\.ly|j\.mp|bitly\.com)[^"]*"[^<>]*>@Uis', '', $content);
}