How to use a view block in a dropdown menu item?
Try out for following modules

Menu Views


  Allows menu items to render views instead of links. This is useful for
  creating "mega-menus".


Menu Attach Block


  Menu Attach Block allows you to attach blocks to standard core Drupal
  menu items. This is especially useful for creating complex dropdown
  menus and mega menus.
  
  Any block can be used, including blocks generated by other modules.
  Blocks generated by Views are particularly good candidates for
  embedding.