Redirect from Default WordPress register page to custom register page.

WP-Redirect Register

/**
 * RedirectWPRegister()
 * Redirect from Default wordpress register page to custom register page.
 */
function RedirectWPRegister(){
	$request = basename($_SERVER['REQUEST_URI']);
	if ($request == 'wp-login.php?action=register'):
		wp_redirect(site_url('/?page_id=776'));
		exit();
	endif;
}
add_filter('init', 'RedirectWPRegister');