Wordpress - Get Menu

footer.php

<?php wp_nav_menu( array( 'theme_location' => 'new-menu' ) ); // Apply the theme location with the CMS ?>
<?php wp_nav_menu( array( 'theme_location' => 'another-menu' ) ); // Apply the theme location with the CMS ?>
<?php wp_nav_menu( array( 'theme_location' => 'an-extra-menu' ) ); // Apply the theme location with the CMS ?>

functions.php

function register_my_menus() {
  register_nav_menus(
    array(
      'new-menu' => __( 'New Menu' ),
      'another-menu' => __( 'Another Menu' ),
      'an-extra-menu' => __( 'An Extra Menu' )
    )
  );
}
add_action( 'init', 'register_my_menus' );