Ayuda Html[No resuelta]

<div class="content-wrapper">
    <!-- Content Header (Page header) -->
    <section class="content-header">
     <!-- Main content -->
    <section class="content">
      <div class="row">
        <div class="col-xs-12">
          <div class="box">
            <div class="box-header">
 <h3 class="box-title">Registrar Orden</h3>
            </div>
            <!-- /.box-header -->
            <div class="box-body">
<form action="<?php echo base_url(); ?>ordenes/adicionar_orden" method="post">
                
                  
        <div class="box-body">
          <div class="row">
            <div class="col-md-6">
            <div class="form-group">
             <label >Fecha Orden</label>
                <input type="date" class="form-control" name="">
                  </div>
                
                        <!-- /.form-group -->
                        
                        <!-- /.form-group -->
                      </div>
                      <!-- /.col -->
                      <div class="box-body">
          <div class="row">
                       <div class="col-md-6">
                        <div class="form-group">
                          <label>Estado Orden</label>

                          <select class="form-control select2" class="form-group" name="fk_id_estado_orden"  id="fk_id_estado_orden">
                    <?php  
                    if(count($estado_ord)){
                      foreach($estado_ord as $i){
                        echo "<option value='".$i['id_estado_orden']. "'>".$i['desc_est_ord']."</option>";
                      }
                    }
                    ?>
                  </select> 
                </div>
              </div>
            </div>
                        </div>
                        <!-- /.form-group -->
                         <div class="box-body">
          <div class="row">
            <div class="col-md-6">
                        <div class="form-group">
                  <label >Tipo Orden</label>
                  <select  class="form-control select2" name="fk_id_tipo_orden" id="fk_id_tipo_orden">
                    <?php  
                    if(count($tipo_orden)){
                      foreach($tipo_orden as $f){
                        echo "<option value'".$f['id_tipo_orden']. "'>".$f['id_tipo_orden']."</option>";
                      }
                    }
                    ?>
                  </select> 
                </div>
              </div>
            </div>
          </div>
           <div class="box-body">
          <div class="row">
            <div class="col-md-6">
                <div class="form-group">
                  <label >Empresa</label>
                  <select class ="form-control select2" class="form-group" name="fk_id_empresa" id="fk_id_empresa">
                    <?php  
                    if(count($empresa)){
                      foreach($empresa as $f){
                        echo "<option value'".$f['id_empresa']. "'>".$f['id_empresa']."</option>";
                      }
                    }
                    ?>
                  </select> 
                </div>
              </div>
            </div>
          </div>
                <div class="form-group">
                  <label >Cliente</label>
                  <select  class="form-control select2" name="fk_id_cliente" id="fk_id_cliente">
                    <?php  
                    if(count($cliente)){
                      foreach($cliente as $f){
                        echo "<option value'".$f['id_identificacion']. "'>".$f['id_identificacion']."</option>";
                      }
                    }
                    ?>
                  </select> 
                </div>
                <div class="form-group">
                  <label >ID Asesor</label>
                  <select class= "form-control select2" name="fk_id_empleado"  id="fk_id_empleado">
                    <?php  
                    if(count($empleado)){
                      foreach($empleado as $h){
                        echo "<option value'".$h['id_empleado']. "'>".$h['id_empleado']."</option>";
                      }
                    }
                    ?>
                  </select> 
                </div>

                        <!-- /.form-group -->
                      </div>
                      <!-- /.col -->
                    </div>
                    <!-- /.row -->
                  </div>
                  <div class="box-body">
                    
                    
                    
                    <div class="form-group">
                      <label>Sub-Total</label>
                      <input type="text" class="form-control" name="subtotal" >
                    </div>
                    <div class="form-group">
                      <label>Importe Iva</label>
                      <input type="number" class="form-control" name="importe_iva" >
                    </div>  
                    <div class="form-group">
                      <label>Iva</label>
                      <input type="text" class="form-control" name="iva" >
                    </div>  
                    <div class="form-group">
                  <label>Importe-Iva</label>
                  <input type="text" class="form-control" id="importe_iva" name="importe_iva" >
                </div>
                <div class="form-group">
                  <label>Iva</label>
                  <input type="text"  class="form-control" id="iva" name="iva" >
                </div>
                <div class="form-group">
                  <label>Importe Descuento</label>
                  <input type="text" class="form-control" id="importe_descuento" name="importe_descuento" >
                </div>
                 <div class="form-group">
                      <label>Descuento</label>
                      <input type="text" class="form-control" id="descuento" name="descuento" >
                    </div>
                     <div class="form-group">
                      <label>Valor Total</label>
                      <input type="text"  class="form-control" id="valor_total" name="valor_total" >
                    </div>
                     <div class="form-group">
                      <label>Observaciones</label>
                      <input type="text"  class="form-control" id="observaciones" name="observaciones" >
                    </div>
                    <div class="form-group">
                  <label >Tipo de Pago</label>
                  <select  class="form-control select2" name="fk_id_tipo_pago"  id="fk_id_tipo_pago">
                    <?php  
                    if(count($tipo_pago)){
                      foreach($tipo_pago as $h){
                        echo "<option value'".$h['id_tipo_pago']. "'>".$h['id_tipo_pago']."</option>";
                      }
                    }
                    ?>
                  </select> 
                </div>
                 
                    
                  </div>
                <!-- /.box-body -->

                  <div class="box-footer">
                    <button type="submit" class="btn btn-primary">Submit</button>
                  </div>