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tieu de1

// Register Default Headers
function text1() {

	$headers = array(
		'tieu de 1' => array(
			'description'   => __( 'thucdon1', 'text_domain' ),
			'url'           => '',
			'thumbnail_url' => '',
		),
		'tieu de 2' => array(
			'description'   => __( 'thucdon2', 'text_domain' ),
			'url'           => '',
			'thumbnail_url' => '',
		),
		'tieude3' => array(
			'description'   => __( 'thucdon3', 'text_domain' ),
			'url'           => '',
			'thumbnail_url' => '',
		),
	);
	register_default_headers( $headers );

}
add_action( 'after_setup_theme', 'text1' );