你要找的是所谓的自定义帖子类型，或者短期内称为CPT。要注册一个新的帖子类型，可以使用这样一个简单的代码，它将添加一个名为article 至您的管理面板：

function register_my_post_type() {
    $labels = array(
        \'name\'                => __( \'Articles\', \'text-domain\' ),
        \'singular_name\'       => __( \'Article\', \'text-domain\' ),
        \'menu_name\'           => __( \'Articles\', \'text-domain\' ),
        \'parent_item_colon\'   => __( \'Parent Article\', \'text-domain\' ),
        \'all_items\'           => __( \'All Articles\', \'text-domain\' ),
        \'view_item\'           => __( \'View Article\', \'text-domain\' ),
        \'add_new_item\'        => __( \'Add New Article\', \'text-domain\' ),
        \'add_new\'             => __( \'Add New\', \'text-domain\' ),
        \'edit_item\'           => __( \'Edit Article\', \'text-domain\' ),
        \'update_item\'         => __( \'Update Article\', \'text-domain\' ),
        \'search_items\'        => __( \'Search Artcile\', \'text-domain\' ),
        \'not_found\'           => __( \'Not Found\', \'text-domain\' ),
        \'not_found_in_trash\'  => __( \'Not found in Trash\', \'text-domain\' ),
    );  
    $args = array(
        \'label\'               => __( \'articles\', \'text-domain\' ),
        \'description\'         => __( \'Website\\\'s articles\', \'text-domain\' ),
        \'labels\'              => $labels,
        \'supports\'            => array( \'title\', \'editor\', \'excerpt\', \'author\', \'thumbnail\', \'comments\', \'revisions\', \'custom-fields\', ),
        \'hierarchical\'        => false,
        \'public\'              => true,
        \'show_ui\'             => true,
        \'show_in_menu\'        => true,
        \'show_in_nav_menus\'   => true,
        \'show_in_admin_bar\'   => true,
        \'menu_position\'       => 5,
        \'can_export\'          => true,
        \'has_archive\'         => true,
        \'exclude_from_search\' => false,
        \'publicly_queryable\'  => true,
        \'capability_type\'     => \'post\',        
        \'taxonomies\'          => array( \'category\',\'post_tag\' ),
    );
    register_post_type( \'article\', $args );
}
add_action( \'init\', \'register_my_post_type\', 0 );

第二个数组包含诸如被包括在搜索中、公开等特性。

有关这方面的更多详细信息，请查看官方codex 第页关于register_post_type.