I’m currently trying to show a drop down menu to select as the footer menu using the wordpress customizer API. Below is my add_control code

$wp_customize->add_control(
    new WP_Customize_Control(

$wp_customize,

'js_footer_service_input',

array(
            'label'    => __( 'Footer Services Pages', 'max' ),

'section'  => 'js_topbar_section',

'settings' => 'js_footer_service',

'type'     => 'select',

'choices' =>  array(


  )));

After the ‘choices’ section is where am stuck as i don’t know what function to call so as to display all the nav menus available on the site as dropdown.

Thanks