解决了:
<?php
            GLOBAL $wpdb;
            $query = "
            SELECT 
                terms.slug, r.term_taxonomy_id, terms.name AS cat_name 
            FROM 
                {$wpdb->prefix}term_taxonomy t, {$wpdb->prefix}terms terms, $wpdb->posts p, $wpdb->term_relationships r 
            WHERE 
                t.term_id=terms.term_id AND 
                p.ID = r.object_id AND
                r.term_taxonomy_id = t.term_taxonomy_id AND 
                p.ID = '".$post->ID."'
            ORDER BY terms.term_order ASC, terms.term_id DESC";
            $categories = $wpdb->get_results($query, ARRAY_A);
            if(is_array($categories)){
                $i=1;
                foreach($categories as $category) { 
                    echo '<span>'.$category['cat_name'].'</span>';
                    ++$i;
                }#end foreach($categories 
            }#end if
            ?>