Url helper function overrides

MY_url_helper.php

<?php defined('BASEPATH') or exit('No direct script access allowed');

/**
 * Anchor Link
 *
 * Creates an anchor based on the local URL.
 *
 * @access public
 * @param string the URL
 * @param string the link title
 * @param mixed any attributes
 * @return string
 */
if ( ! function_exists('anchor'))
{
	function anchor($uri = '', $title = '', $attributes = '', $relative = FALSE)
	{
		$title = (string) $title;

		if ( $relative === TRUE)
		{
			$site_url = is_array($uri) ? implode('/', $uri) : $uri;
		}
		elseif ( ! is_array($uri))
		{
			$site_url = ( ! preg_match('!^\w+://! i', $uri)) ? site_url($uri) : $uri;
		}
		else
		{
			$site_url = site_url($uri);
		}

		if ($title == '')
		{
			$title = $site_url;
		}

		if ($attributes != '')
		{
			$attributes = _parse_attributes($attributes);
		}

		return '<a href="'.$site_url.'"'.$attributes.'>'.$title.'</a>';
	}
}