<link href="//netdna.bootstrapcdn.com/bootstrap/3.1.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.1.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<form class="form-horizontal">
<fieldset>
<legend>Sistemas</legend>
<div class="form-group">
<label class="col-md-4 control-label" for="nome">Nome</label>
<div class="col-md-5">
<input id="nome" name="nome" type="text" placeholder="Nome do sistema" class="form-control input-md" required="">
</div>
</div>
<div class="form-group">
<label class="col-md-4 control-label" for="ativo">Ativo</label>
<div class="col-md-4">
<label class="radio-inline" for="ativo-0">
<input type="radio" name="ativo" id="ativo-0" value="S" checked="checked">
Sim
</label>
<label class="radio-inline" for="ativo-1">
<input type="radio" name="ativo" id="ativo-1" value="N">
Não
</label>
</div>
</div>
</fieldset>
</form>
