Use WikiCite for Omeka plugin instead! http://github.com/clioweb/WikiCiteOmeka Generates Wikipedia citation code for an Omeka Item, and appends to the items/show page.

wikicite.php

<?php
/*
I created an Omeka plugin, WikiCite for Omeka, based on this code:

http://github.com/clioweb/WikiCiteOmeka

*/
/**
 * Generates Wikipedia citation code for an Omeka Item, and appends to the items/show page. 
 * Based on Cite_web template at http://en.wikipedia.org/wiki/Template:Cite_web, and 
 * inspired by Seb Chan implementation for Powerhouse Museum at 
 * http://www.powerhousemuseum.com/dmsblog/index.php/2011/01/20/quick-wikipedia-citation-code-added-to-collection/
 *
 * @todo Add more citation parameters if available in item.
 *
 * @param Item|null $item Check for this specific item record (current item if null). 
 * @param boolean $textarea Whether to wrap the cite_web code in a textarea (true by default).
 */
function wikicite_for_item($item = null, $textarea = true)
{
	$html = '';
	
	if (!$item) {
		$item = get_current_item();
	}
	
	$html .= '{{cite web';
	$html .= ' |url = '.item('permalink');
	$html .= ' |title = '.item('Dublin Core', 'Title', array(), $item);
	$html .= '}}';
	
	if ($textarea) {
		$html = '<textarea rows="3" style="width:100%;" id="wikipedia-cite-code">'.$html.'</textarea>';
	}
	
	echo $html;
}

add_plugin_hook('public_append_to_items_show', 'wikipedia_web_cite_for_item');