On every click link changes in blade view

This is the blade view to create the url links

@section ('category')
    <ul class="main-categories">
        @foreach($category as $category)
            <li class="main-nav-list"><a href="/"><span class="number"></span></a></li>
        @endforeach
    </ul>
@endsection

when i click for the first time it's working fine and the url I get is

http://localhost/shopnew/public/glassfilm/Frosted

when I click for the secon time the url I get is

http://localhost/shopnew/public/glassfilm/glassfilm/Frosted

what I am doing wrong?

via Chebli Mohamed