1

$wp_customize->add_setting('gallery_photos_1', array(
'default' => '',)) ;

$wp_customize->add_control('gallery_photos_1', array(
'label' 	=> '1st image',
'section' 	=> 'gallery_photos',
'settings' 	=> 'gallery_photos_1',
'priority'	=> 1,
'type' 		=> 'text',));