Remove top header line in TableView

Hi,

Using Xamarin Forms 1.3.3.0
I'm using TableView controls in a grid in order to build a TabMenu bar (each menu being a ImageCell with an image and a text).

How can I get rid of the top line that appear above each of my TableView?
I know there's already a bug for this: https://bugzilla.xamarin.com/show_bug.cgi?id=21446. But it still doesn't seem to be any fix.

If not possible, do you know any other alternative in order to build such a TabMenu bar? Each menu should be clickable, with a highlight background color when tapped down.

Thanks for your help,
Alex