<ul id="gkProductTabs">
<li class="gkProductTabActive"><span><?php echo JText::_('COM_VIRTUEMART_PRODUCT_DESC_TITLE') ?></span></li>
<li><span><?php echo JText::_('COM_VIRTUEMART_ProductSpec') ?></span></li> <li><span><?php echo JText::_('COM_VIRTUEMART_REVIEWS') ?></span></li>
</ul>
<div class="td_bg">
<div id="gkProductTab1" class="gkProductTab">
we add a new tab to show Product custom_fields, but it don't work. Who can help me?