public OnClientPostAdminCheck(client)
{
     new AdminId:id = GetUserAdmin(client);
     if (id != INVALID_ADMIN_ID)
     {
         new groups = GetAdminGroupCount(id);
         if (groups > 0)
         {
             decl String:group_name[55];
             for (new i = 0; i < groups; i++)
             {
                 if (GetAdminGroup(id, i, group_name, 55) != INVALID_GROUP_ID)
                 {
                     // Игрок состоит в группе group_name
                     PrintToServer("%d. \"%s\"", i + 1, group_name);
                 }
             }
         }
     }
}