How to programmatically change the menu?

Question

Drupal

Drupal 7
There is a module for a custom menu. I create links in the admin.
The menu is rendered on the page. How can I change it programmatically? Those. what hook should be used so that it can be retrieved and changed before rendering?

Answer 1

Here is an example code of my render menu 'main-menu'

function custom_main_menu() {
  global $language;
  $item = menu_get_item();
  $bp = base_path();
  $menu_data = menu_tree_all_data('main-menu');
  $menu_data = i18n_menu_localize_tree($menu_data,$language->language);
  $menu_data = menu_tree_output($menu_data);
  $menu_data = array_intersect_key($menu_data, array_flip(array_filter(array_keys($menu_data), 'is_numeric')));

  $menu = '<ul class="navbar-nav">';

  foreach ($menu_data as $menu_link) {
    $link = $menu_link['#original_link'];
    $submenu = $menu_link['#below'];

    if($submenu) {
      $class = ' ts-has-child';
      $submenu = array_intersect_key($submenu, array_flip(array_filter(array_keys($submenu), 'is_numeric')));
    } else $class = '' ;

    $link['link_path'] == $item['path'] ? $active = ' active' : $active = '' ;
    $link['external'] ? $url = $link['link_path'] : $url = $bp.$link['link_path'];
    $menu .= '<li class="nav-item'.$class.'">';
    $menu .= '<a class="nav-link'.$active.'" href="'.$url.'">'.$menu_link['#title'];
    $active ? $menu .= '<span class="sr-only">(current)</span>' : NULL ;
    $menu .= '</a>';

    if($submenu) {
      $menu .= '<span class="d-block d-sm-none carret"></span><ul class="ts-child">';

      foreach ($submenu as $submenu_link) {
        $link = $submenu_link['#original_link'];
        $submenu2 = $submenu_link['#below'];    $submenu = array_intersect_key($submenu, array_flip(array_filter(array_keys($submenu), 'is_numeric')));

        $submenu2 ? $class = ' ts-has-child' : $class = '' ;

        if($submenu2) {
          $class = ' ts-has-child';
          $submenu2 = array_intersect_key($submenu2, array_flip(array_filter(array_keys($submenu2), 'is_numeric')));
        } else $class = '' ;

        $link['link_path'] == $item['path'] ? $active = ' active' : $active = '' ;
        $link['external'] ? $url = $link['link_path'] : $url = $bp.$link['link_path'];

        $menu .= '<li class="nav-item'.$class.'">';
        $menu .= '<a class="nav-link'.$active.'" href="'.$url.'">'.$submenu_link['#title'];
        $active ? $menu .= '<span class="sr-only">(current)</span>' : NULL ;
        $menu .= '</a>';

        if($submenu2) {
          $menu .= '<ul class="ts-child">';

          foreach ($submenu2 as $submenu2_link) {
            $link = $submenu2_link['#original_link'];
            $link['link_path'] == $item['path'] ? $active = ' active' : $active = '' ;
            $menu .= '<li class="nav-item">';
            $menu .= '<a class="nav-link'.$active.'" href="'.$bp.$link['link_path'].'">'.$submenu2_link['#title'];
            $active ? $menu .= '<span class="sr-only">(current)</span>' : NULL ;
            $menu .= '</a></li>';
          }

          $menu .= '</ul>';
        }
        $menu .= '</li>';
      }

      $menu .= '</ul>';
    }
    $menu .= '</li>';
  }
  $menu .= '</ul>';

  return $menu;
}