Caregory shows up like html-code with URL

In the menuitem knowledge base categories.
The categorie mail sows up like: "Mail category" href="/index.php/helpdesk-faq?view=articles&filter_category_id=8">Mail"

So it is a piece of the html-code

it is the " in front of href but where does it come from?

in com_helpdeskpro\View\Categories\tmpl\default.php
is a line
Regel 32 - <i class="icon-folder-open"></i><a title="<?php echo JText::sprintf('HDP_VIEW_ALL_ARTICLES_IN_CATEGORY', $item->title);?>" href>="<?php echo JRoute::_('index.php?option=com_helpdeskpro&view=articles&filter_category_id='.$item->id.'&Itemid='.$this->Itemid) ?>"><?php echo $item->title; ?></a><span class="hdp-articles-count badge badge-info"><?php echo $item->total_articles; ?></span>
I changed the " in '
<a title=" becomes <a title="
title);?>" becomes title);?>'

problem solved