我会亲自创建三个custom taxonomies 而不是对类别/子类别执行此操作，那么这就不是问题了。

要对类别/子类别执行此操作，请从父类别的名称/ID开始，循环遍历每个父类别，然后在其中循环遍历与帖子关联的术语，并对照顶级类别的ID检查术语的父ID：

// names / IDs of parents
$parents = array(
    \'Brand\' => 42,
    \'Region\' => 22,
    \'Grape\' => 18
);
// get post categories
$categories = get_the_terms( $post->ID, \'category\' );
// output top level cats and their children
foreach( $parents as $parent_name => $parent_id ):
    // output parent name and link
    echo \'<a href="\' . get_term_link( $parent_id, \'category\' ) . \'">\' . $parent_name . \'</a>: \';
    // initialize array to hold child links
    $links = array();
    foreach( $categories as $category ):
        if( $parent_id == $category->parent ):
            // put link in array
            $links[] = \'<a href="\' . get_term_link( $category ) . \'">\' . $category->name . \'</a>\';
        endif;
    endforeach;
    // join and output links with separator
    echo join( \', \', $links );
endforeach;

// get top level terms
$parents = get_terms( \'category\', array( \'parent\' => 0 ) );
// get post categories
$categories = get_the_terms( $post->ID, \'category\' );
// output top level cats and their children
foreach( $parents as $parent ):
    // output parent name and link
    echo \'<a href="\' . get_term_link( $parent ) . \'">\' . $parent->name . \'</a>: \';
    // initialize array to hold child links
    $links = array();
    foreach( $categories as $category ):
        if( $parent->term_id == $category->parent ):
            // put link in array
            $links[] = \'<a href="\' . get_term_link( $category ) . \'">\' . $category->name . \'</a>\';
        endif;
    endforeach;
    // join and output links with separator
    echo join( \', \', $links );
endforeach;