<!-- Standard button with label -->
<button class="btn btn-labeled btn-default" type="button"><span class="btn-label"><i class="glyphicon glyphicon-arrow-left"></i></span>Left</button>

<!-- Standard button with label on the right side -->
<button class="btn btn-labeled btn-default" type="button">Right<span class="btn-label btn-label-right"><i class="glyphicon glyphicon-arrow-right"></i></span></button>

<!-- Success button with label -->
<button class="btn btn-labeled btn-success" type="button"><span class="btn-label"><i class="glyphicon glyphicon-ok"></i></span>Success</button>

<!-- Danger button with label -->
<button class="btn btn-labeled btn-danger" type="button"><span class="btn-label"><i class="glyphicon glyphicon-remove"></i></span>Danger</button>