尝试：

$tt = get_terms(\'my_custom_taxonomy\', array(
    // You can stick in orderby, order, exclude, child_of, etc. params here.
));

foreach ($tt as $term) :
    // Output term name
    print $term->name.  ": ";

    $q = new WP_Query(array(
        \'post_type\' => \'custom_post_type_i_use\',
        \'post_status\' => \'publish\',
        \'posts_per_page\' => -1, // = all of \'em
        \'tax_query\' => array(
            \'taxonomy\' => $term->taxonomy,
            \'terms\' => array( $term->term_id ),
            \'field\' => \'term_id\',
        ),
    ));

    $first = true;
    foreach ($q->posts as $item) :
        // ... now do something with $item, for example: ...
        if ($first) : $first = false; else : print ", "; endif;
        print \'<a href="\'.get_permalink($item->ID).\'">\'
          .$item->post_title.\'</a>\';
    endforeach;
endforeach;