Menu Drop Down

Assuming you are using a Custom Menu, you can create a Custom Link for the drop down header, and set the URL to #, which keep the link from actually leaving the page.

If you further want to turn the pointer into a default cursor when hovering over this header link (so viewers don’t get confused and try to click on it), give it a class (for example .my-header-link), and then add this to your css:

.my-header-link > a {
cursor: default !important;
}