Praxis_Menu Register

// Register Navigation Menus
function praxis_navigation_menus() {

	$locations = array(
		'primary_header_menu' => __( 'Header menu top', 'text_domain' ),
		'secondary_footer_menu' => __( 'Footer menu', 'text_domain' ),
	);
	register_nav_menus( $locations );

}

// Hook into the 'init' action
add_action( 'init', 'praxis_navigation_menus' );