PHP 5.5 patch for Magento 1.9

Abstract.php

<?php
class Mage_Core_Helper_Abstract
{
//...
    /**
     * Remove html tags, but leave "<" and ">" signs
     *
     * @param   string $html
     * @return  string
     */
    public function removeTags($html)
    {
        /*
         * [gplanchat] Updated code for PHP 5.5+ compatibility
         * @see https://wiki.php.net/rfc/remove_preg_replace_eval_modifier
         * {{{
         */
        $html = preg_replace_callback('# <(?![/a-z]) | (?<=\\s)>(?![a-z]) #xi', function($matches){
            return htmlentities($matches[0]);
        }, $html);
        // }}}
        $html =  strip_tags($html);
        return htmlspecialchars_decode($html);
    }
//...
}

How we can use this patch?