Span not working in bootstrap 3

Span is not working in bootstrap v3.0.3.

 <div class="span4">    
        <div class="list-group">
        <a href="#" class="list-group-item active">Link</a>
        <a href="#" class="list-group-item">Link 1</a>
        <a href="#" class="list-group-item">Link 2</a>
        <a href="#" class="list-group-item">Link 3</a>
        <a href="#" class="list-group-item">Link 4</a>
        </div>
    </div>