As stated by my colleague that the kind of customization you are looking is outside scope of the support we offer. Having said that I can tell you the file names, path and few resources that you want to look at to make necessary changes.
File that you should look at is
_navbar.php under /x/framework/legacy/cranium/header/views/global/
Before making any changes in core file we suggest you to setup child theme.
Please note that above links will help you to get started. If you are not comfortable making changes yourself, I would advise you to get professional help.