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<?php

add_filter( 'manage_edit-shop_order_columns', 'imarcon_set_custom_column_order_columns');

function imarcon_set_custom_column_order_columns($columns) {
// global $woocommerce;
$nieuwearray = array();
 foreach($columns as $key => $title) {
   if ($key=='billing_address') // in front of the Billing column
     $nieuwearray['order_producten']  = __( 'Products', 'woocommerce' );
    $nieuwearray[$key] = $title;
  }
    return $nieuwearray ;
}

add_action( 'manage_shop_order_posts_custom_column' , 'imarcon_custom_shop_order_column', 10, 2 );
function imarcon_custom_shop_order_column( $column ) {
 global $post, $woocommerce, $the_order;

    switch ( $column ) {

        case 'order_producten' :
            $terms = $the_order->get_items();

	      if ( is_array( $terms ) ) {
             	foreach($terms as $term)
		{
		echo $term['item_meta']['_qty'][0] .' x ' . $term['name'] .'<br />';
		}
              } else {
              	_e( 'Unable get the producten', 'woocommerce' );
		}
            break;

    }
}
?>