solved
// About metabox
$meta_boxes[] = array(
'id' => 'about_meta',
'title' => 'About Page Fields',
'post_types' => array('page'),
'include' => array(
// List of page templates. Can be array or comma separated. Optional.
'template' => array( 'page-about.php' ),
),
'context' => 'normal',
'priority' => 'high',
'fields' => array(
array(
'name' => '',
'id' => 'about_meta',
'type' => 'text',
),
),
);
