在注册元盒之前定义元盒时，只需设置其适用的PostType：

$f711_meta_boxes[] = array(
    \'id\' => \'details\',
    \'title\' => __( \'Details\', \'f711_theme\' ),
    \'pages\' => array( \'publicity\' ), // change this values
    \'context\' => \'normal\',
    \'priority\' => \'high\',
    \'fields\' => array(

        array(
            \'name\' => __( \'Fischi ist\', \'f711_theme\' ),
            \'desc\' => __( \'Jaja, Beschreibung\', \'f711_theme\' ),
            \'id\' => \'f711_is\',
            \'type\' => \'select\',
            \'options\' => array( __( \'gut\', \'f711_theme\' ), __( \'super\', \'f711_theme\' ))
        )

    )
);