How can I make it that only categories with published items show up in the Module (cat. menu list version)?

The module only checks for the publishing status of the categories. If you want to hide a category just unpublish it.

I managed to do this.

About line 550 - 570 in root/modules/mod_k2_tools/helper.php.

Change

foreach ($rows as $row)
{
if ($params->get('categoriesListItemsCounter'))
{
$row->numOfItems = ' ('.modK2ToolsHelper::countCategoryItems($row->id).')';
}
else
{
$row->numOfItems = '';
}

if (($option == 'com_k2') && ($view == 'itemlist') && ($catid == $row->id))
{
$active = ' class="activeCategory"';
}
else
{
$active = '';
}

if (modK2ToolsHelper::hasChildren($row->id))


CHANGE TO


foreach ($rows as $row)
{
if ($params->get('categoriesListItemsCounter'))
{
$itemnumber = modK2ToolsHelper::countCategoryItems($row->id);
}



if ($itemnumber==0)
{
$active = ' class="hidden"';
}
else
{
$active = '';
}




if (modK2ToolsHelper::hasChildren($row->id))

Rupert keep a backup of this edit (or the URL of the thread in this case) because you will need to reapply it when you update K2.

Yes I will thanks. Updates are not too frequent ;p

Here is improved replacement code - to keep the "active" class for active categories: