Change HTML in .net page

Hi, I am creating a .net page which has a sharepoint 2013 navigation system.
When the page loads sharepoint creates the navigation menu.
I've found a script which allows me to create an accordian for the menu, it works great but there is one annoying bug.
I have found a fix, but I am unsure how to fix it, what I am trying to do is change the tags from this:
<a tabindex="0" class="static menu-item ms-core-listMenu-item ms-displayInline ms-navedit-linkNode" href="/employment/#"><span class="additional-background ms-navedit-flyoutArrow"><span class="menu-item-text">People</span></span></a> to this:
<span tabindex="0" class="static menu-item ms-core-listMenu-item ms-displayInline ms-navedit-linkNode" href="/employment/#"> ...