<section class="content">
    <div class="row">
        <div class="col-md-3">
            <div class="box box-solid">
                <div class="box-header with-border">
                    <h3 class="box-title">Pastas</h3>

                    <div class="box-tools">
                        <button type="button" class="btn btn-box-tool" data-widget="collapse"><i class="fa fa-minus"></i>
                        </button>
                    </div>
                </div>
                <div class="box-body no-padding">
                    <ul class="nav nav-pills nav-stacked msg-interna">
                        <li class="<?php echo $class_inbox; ?>"><a href="<?php echo base_url('sistema/conta/inbox');?>"><i class="fa fa-inbox"></i> Inbox<span class="label label-success pull-right"><?php echo $novos_qtd; ?></span></a></li>
                        <li class="<?php echo $class_trash; ?>"><a href="<?php echo base_url('sistema/conta/lixo');?>"><i class="fa fa-trash-o"></i> Lixo</a></li>
                    </ul>
                </div>
                <!-- /.box-body -->
            </div>
            <!-- /. box -->
        </div>
        <!-- /.col -->
        <div class="col-md-9">
            <div class="box box-success">
                <?php echo $box_piece; ?>
            </div>
            <!-- /. box -->
        </div>
        <!-- /.col -->
    </div>
    <!-- /.row -->
</section>