WordPress自定义文章类型支持选择父级文章

/**创建课程自定义文章类型**/

function my_custom_post_course() {

  $labels = array(

    'name'               => _x( '课程', 'post type 名称' ),

    'singular_name'      => _x( '课程', 'post type 单个 item 时的名称，因为英文有复数' ),

    'add_new'            => _x( '添加新课程', '添加新内容的链接名称' ),

    'add_new_item'       => __( '添加新课程' ),

    'edit_item'          => __( '编辑课程' ),

    'new_item'           => __( '新课程' ),

    'all_items'          => __( '所有课程' ),

    'view_item'          => __( '预览课程' ),

    'search_items'       => __( '搜索课程' ),

    'not_found'          => __( '没有找到课程' ),

    'not_found_in_trash' => __( '回收站没有找到课程' ),

    'parent_item_colon'  => '父级',

    'menu_name'          => '课程'

  );

  $args = array(

    'labels'        => $labels,

    'description'   => '课程管理',

    'public'        => true,

    'menu_position' => 5,

    'hierarchical'  => true,

    'supports'      => array('title','editor','author','thumbnail','excerpt','comments','page-attributes'),

    'has_archive'   => false,

  );

  register_post_type( 'course', $args );

}

add_action( 'init', 'my_custom_post_course' );