当我从数据库中的头部导航栏中选择类别时http://www.taracomplementos.com/tara/, 默认显示的是数据库的所有项目，您必须选择页面中的一个类别才能查看相关文章。我希望我知道如何只显示属于特定类别的项目。我认为诀窍一定在以下几行，但我不知道如何修改它：

        <div class="sort">
        <ul id="portfolio-control">
            <li class="segment-1"><!-- changed All for todo --><a class="active all" data-value="all" href="#"><?php _e(\'todo\', \'ux\') ?></a></li>
            <?php wp_list_categories(array(\'title_li\' => \'\', \'exclude\' => $excludecat,\'taxonomy\' => \'skill-type\', \'walker\' => new Walker_Category_Filter())); ?>
        </ul>
    </div>
    <?php endwhile; else : endif; ?>
</div>
<div class="span16 gallery">
    <?php $args = array(
       \'post_type\' => \'portfolio\',
       \'orderby\'=>\'menu_order\',
       \'order\'     => \'ASC\',
       \'posts_per_page\' => \'-1\',
       \'skill-type\' => get_query_var(\'skill-type\'),
       \'tax_query\' => array(
       array(
               \'taxonomy\' => \'skill-type\',
               \'field\' => \'id\',
               \'terms\' => $excludecat,
               \'operator\' => \'NOT IN\',
               )
           ) // end of tax_query
       );
    ?>
    <?php $query = new WP_Query($args); ?>