I would like to have some custom links in the dropdown menu, but then on the thirth level.

I now have like:

    RootCategory
    -> Category1 (eg Baby)
       -> Gender (eg Boy or Girl)
          -> Kind of clothing (eg trousers, shirts ...)

But i want to add an extra 2nd level category "Brands".
On which i want to display some featured brands. 
I also have de Amasty Improved navigation extension, so my brandpages have the following url:  `www.website.com/brand.html`

I would like to have this setup:

    RootCategory
    -> Category1 (eg Baby)
       -> Gender (eg Boy or Girl)
          -> Kind of clothing (eg trousers, shirts ...)
       -> Brands
          -> Featured Brand 1
          -> Featured Brand 2

But now they get the url: www.website.com/Category1/Brands/brands.html

*My Question:*
How could i change the link in the navigation to the short url: `www.website.com/brand.html`

I am using Magento 1.8.1 CE