Have any example?

Here an example:
http://fezvrasta.github.io/bootstrap-material-design/#dropdown-menu

The "arrow icon" is broken there because one of the contributors is making some changes to the theme.

The "arrow icon" is broken there because one of the contributors is making some changes to the theme.

You mean the thing at the end of the input? It's broken also in my project, can you please tell how to remove that?

Thanks

You should be able to disable or change the symbol displayed tweaking:

.dropdownjs > ul > li > .close:before

Thanks for your reply.
But we can't search like select2.

This is dropdown menu, not dropdown.

If there's a feature you would like, just send a PR to implement it.