View file upload/library/XenForo/ViewPublic/Thread/MultiQuoteOverlay.php

<?php

class XenForo_ViewPublic_Thread_MultiQuoteOverlay extends XenForo_ViewPublic_Base
{
	public function renderHtml()
	{
		$formatter = XenForo_BbCode_Formatter_Base::create('XenForo_BbCode_Formatter_Base', array(
			'view' => $this
		));
		$parser = XenForo_BbCode_Parser::create($formatter);

		foreach ($this->_params['posts'] AS $postId => $post)
		{
			$this->_params['posts'][$postId]['messageParsed'] = $parser->render($post['message']);
		}
	}
}