Remove all posts of categories from Navigation

Hi,

I’m trying to do 2 things with this plugin.

1) Retrieve all featured images from category “beer”
2) Remove these pages from the navigation.

Here is my code, it shows the featured images fine but when it comes to removing the IDs it removes ALL pages regardless of category.

$beers2 = get_pages(array('category' => 'beers', 'post_type' => 'page', 'post_status' => 'publish', 'numberposts' => -1));
  $ids = "'";
  $pump_wall = "";
  foreach($beers2 as $beer) {
    $pump_wall .= get_the_post_thumbnail($beer->ID);
    $ids .= $beer->ID . ",";
  }
  $ids .= "'";

  wp_nav_menu(array('exclude' => $ids));

  echo "Pump Wall<br/>";
  echo $pump_wall;

https://www.ads-software.com/plugins/add-category-to-pages/