kickassproxify.user.js

// ==UserScript==
// @id             987654321
// @name           KickAss Torrents Proxify
// @version        1.0
// @description    Redirects you to a KickAss Torrents proxy
// @run-at         document-start
// @match          *.kickass.to/*
// @match          *.kat.ph/*
// ==/UserScript==

var pattern = "^(http(s|):\/\/|)(www\.|)";
var kickass = new RegExp(pattern + "kickass\.to", "i");
var kat = new RegExp(pattern + "kat\.ph", "i");
var href = window.location.href.toLowerCase();

if (window.location.hostname.match(kickass) {
	window.location.href = href.replace("kickass.to", "katproxy.com");
}
else if (window.location.hostname.match(kat)) {
	window.location.href = href.replace("kat.ph", "katproxy.com");
}