好吧，我不知道这看起来怎么样，但我已经得到了我想要的。

<?php
        $term = get_queried_object();
        $tax = \'ntp_package_type\';
        $parents = $term->parent;
        $term_id = $term->term_id;

        if($parents == 0 && !is_single()){
        wp_list_categories( array (
                            \'taxonomy\'  => \'ntp_package_type\',
                            \'pad_counts\'=> 0,
                            \'title_li\'  => \'\',
                            \'child_of\'  => $term_id,
                            )
            );  
        }

        elseif ($parents > 0 && is_tax($tax, $tax->name)){

            $args = array(
                    \'post_type\' => \'ntp_package\',
                    $tax => $term->name,
            );
            echo "<h2>".$term->name."</h2>";

            $wp_query = new WP_Query($args);
            if( $wp_query->have_posts() ):
            while ( $wp_query->have_posts() ) : $wp_query->the_post(); 

            echo "<p><a href=\\"".get_permalink()."\\">".$post->post_title."</a></p>";
            endwhile;
            endif;
            wp_reset_postdata();

            wp_list_categories( array (
                \'taxonomy\'  => \'ntp_package_type\',
                \'pad_counts\'=> 0,
                \'title_li\'  => \'\',
                \'child_of\'  => $term->parent,
                \'exclude\'   => $term_id,
                )
            );
        }

        elseif(is_single()){

        $single = get_queried_object();
        $sing_id = $single->ID;

        $singterm = wp_get_post_terms($sing_id, $tax);
        $singterm_slug = $singterm[0]->slug;
        $singterm_parent = $singterm[0]->parent;
        $singterm_id = $singterm[0]->term_id;

        $args = array(
                \'taxonomy\'  => $tax,
                \'term\'      => $singterm_slug,
        );
        ?>

        <h2>
        <a href="<?php echo get_term_link($singterm_slug, $tax); ?>"><?php echo $singterm[0]->name; ?> </a>
        </h2>

        <?php
        $singquery = new WP_Query($args);
        while ($singquery->have_posts()) : $singquery->the_post();
        ?>

        <p>
        <a href="<?php echo get_permalink(); ?>"><?php the_title(); ?></a>
        </p>

        <?php
        endwhile;
        wp_reset_postdata();


        wp_list_categories( array (
            \'taxonomy\'  => \'ntp_package_type\',
            \'pad_counts\'=> 0,
            \'title_li\'  => \'\',
            \'child_of\'  => $singterm_parent,
            \'exclude\'   => $singterm_id,
            )
        );  

        }


        ?>