I have a dropdown menu which repeat itself on every pages of my website. This menu is in a div named "Header" at the top of my page.
The problem is that if I have a modification in that menu, I have to make it to all of my pages, one by one !
What is the way to place that menu so that every time I'll have a modification to this menu, modifications will be applied on every pages of my website ?
Thank you !!