Требуется переделать пагинацию, J3 - Общие вопросы веб разработки

$doc = new DOMDocument();
$doc->loadHTML($html);
$xml = simplexml_import_dom($doc);

<ul class="pager pagenav">
<?php if ($row->prev) : ?>
	<li class="previous">
		<a href="<?php echo $row->prev; ?>" rel="prev"><?php echo JText::_('JGLOBAL_LT'). $pnSpace . JText::_('JPREV'); ?></a>
	</li>
<?php endif; ?>
<?php if ($row->next) : ?>
	<li class="next">
		<a href="<?php echo $row->next; ?>" rel="next"><?php echo JText::_('JNEXT'). $pnSpace . JText::_('JGLOBAL_GT'); ?></a>
	</li>
<?php endif; ?>
</ul>

<ul class="pager pagenav">
<?php if ($row->prev) : ?>
	<li class="previous">
		<a href="<?php echo $row->prev; ?>" rel="prev" class="btn btn-primary"><?php echo JText::_('JGLOBAL_LT'). $pnSpace . JText::_('JPREV'); ?></a>
	</li>
<?php endif; ?>
<?php if ($row->next) : ?>
	<li class="next">
		<a href="<?php echo $row->next; ?>" rel="next" class="btn btn-primary"><?php echo JText::_('JNEXT'). $pnSpace . JText::_('JGLOBAL_GT'); ?></a>
	</li>
<?php endif; ?>
</ul>

$html = mb_convert_encoding($this->item->pagination, 'HTML-ENTITIES', "UTF-8");
$doc = new DOMDocument();
$doc->loadHTML($html);
$xpath = new DOMXPath($doc);
$nodes = $xpath->query('//ul/li/a');
foreach($nodes as $node) 
    $node->setAttribute('class','btn btn-primary'); 
echo $doc->saveHTML(); 

function pagination_list_render($list){
  $html = '<ul class="pagination-list">';
  $html .= $list['start']['data'];
  $html .= $list['previous']['data'];
  foreach($list['pages'] as $k => $page) {
    $html .= $page['data'];
  }
  $html .= $list['next']['data'];
  $html .= $list['end']['data'];
  $html .= '</ul>';
  return $html;
}