Alphaindex für Kategorie-Link

blog_links.php

<?php
/** 
* @package     Joomla.Site
* @subpackage  com_content
* 
* @copyright   Copyright (C) 2005 - 2016 Open Source Matters, Inc. All rights reserved. 
* @license     GNU General Public License version 2 or later; see LICENSE.txt 
*/ 

defined('_JEXEC') or die; 

$arr   = array(); 
$items = $this->link_items; 

foreach ($items as $key => $value)
{
	if (!in_array($value->title[0], $arr))
	{ 
		array_push($arr, $value->title[0]); 
	} 
}
?>
<div class="index-zeile">
	<?php foreach($arr as $letter) : ?>
		<a class="btn" data-link="letter-' . <?php echo $letter; ?> . '" href="#letter-' . <?php echo $letter; ?> . '" />' . <?php echo $letter; ?> . '</a>
	<?php endforeach; ?>
</div> 
<ul class="accordion">
	<?php foreach ($arr as $key => $group) : ?>
		<li id="letter-' . <?php echo $group; ?> . '" class="letter-anchor">
			<div class="panel panel-default">
				<div class="panel-heading">
					<h4 class="panel-title">
						<a href="#' . <?php echo $group; ?> . '" data-toggle="collapse">' . <?php echo $group; ?> . '</a>
					</h4> 
				</div>
			<div id="' . <?php echo $group; ?> . '" data-link="letter-' . <?php echo $group; ?> . '" class="panel-collapse collapse">
				<ul class="list-group">
					<?php foreach ($items as $key => $value) : ?>
						<?php if ($value->title[0] == $group) : ?>
							<li class="list-group-item">
								<div>
									<h4><a href="<?php echo JRoute::_(ContentHelperRoute::getArticleRoute($value->slug, $value->catid, $value->language)); ?>">
										<?php echo $value->title; ?></a>
									</h4>
								</div>
								<div>
									<div class="readmore-btn">
										<a class="read-more" href="<?php echo JRoute::_(ContentHelperRoute::getArticleRoute($value->slug, $value->catid, $value->language)); ?>">
											<?php echo JText::_('COM_CONTENT_READ_MORE_TITLE'); ?>
										</a>
									</div>
								</div>
							</li>
						<?php endif; ?>
					<?php endforeach; ?>
				</ul>
			</div>
		</li>
	<?php endforeach; ?>
</ul>