我遇到了一个问题，我将一个html模板转换为wordpress，现在我希望一个节类别能够使用类别显示内容有人知道解决方案和代码吗？iam使用代码，不适用于类别：

 <?php
            $a = array(
                \'posts_per_page\'   =>200,
                \'offset\'           => 0,
                \'cat\'               => \'\',
                \'category_name\'    => \'\',
                \'orderby\'          => \'post_date\',
                \'order\'            => \'DESC\',
                \'include\'          => \'\',
                \'exclude\'          => \'\',
                \'meta_key\'         => \'\',
                \'meta_value\'       => \'\',
                \'post_type\'        => \'mahsulat\',
                \'post_mime_type\'   => \'\',
                \'post_parent\'      => \'\',
                \'post_status\'      => \'publish\',
                \'suppress_filters\' => true );

            $the_query=new WP_Query($a);
            while($the_query->have_posts())
            {
                $the_query->the_post();

            ?>