function edit(){
        if(isset($_POST['submit'])){
            $uplodFoto = $this->upload_foto_user();
            $this->Model_users->update($uplodFoto);
            redirect('users');
        }else{
            $id_user       = $this->uri->segment(3);
            $data['user']  = $this->db->get_where('tbl_user',array('id_user'=>$id_user))->row_array();
            $this->template->load('template', 'users/edit',$data);
        }
    }





<div class="col-sm-12">
    <!-- start: TEXT FIELDS PANEL -->
    <div class="panel panel-default">
        <div class="panel-heading">
            <i class="fa fa-external-link-square"></i>
            Text Fields
            <div class="panel-tools">
                <a class="btn btn-xs btn-link panel-collapse collapses" href="#">
                </a>
                <a class="btn btn-xs btn-link panel-config" href="#panel-config" data-toggle="modal">
                    <i class="fa fa-wrench"></i>
                </a>
                <a class="btn btn-xs btn-link panel-refresh" href="#">
                    <i class="fa fa-refresh"></i>
                </a>
                <a class="btn btn-xs btn-link panel-expand" href="#">
                    <i class="fa fa-resize-full"></i>
                </a>
                <a class="btn btn-xs btn-link panel-close" href="#">
                    <i class="fa fa-times"></i>
                </a>
            </div>
        </div>
        <div class="panel-body">

            <?php
            echo form_open_multipart('users/edit', 'role="form" class="form-horizontal"');
            echo form_hidden('id_user',$user['id_user']);
            ?>


            <div class="form-group">
                <label class="col-sm-2 control-label" for="form-field-1">
                    NAMA LENGKAP
                </label>
                <div class="col-sm-9">
                    <input type="text" name="nama_lengkap" value="<?php echo $user['nama_lengkap'];?>" placeholder="MASUKAN NAMA LENGKAP" id="form-field-1" class="form-control">
                </div>
            </div>
            <div class="form-group">
                <label class="col-sm-2 control-label" for="form-field-1">
                    USERNAME
                </label>
                <div class="col-sm-9">
                    <input type="text" name="username" value="<?php echo $user['username'];?>" placeholder="MASUKAN USERNAME" id="form-field-1" class="form-control">
                </div>
            </div>
            <div class="form-group">
                <label class="col-sm-2 control-label" for="form-field-1">
                    PASSWORD
                </label>
                <div class="col-sm-9">
                    <input type="password" name="password" placeholder="MASUKAN PASSWORD" id="form-field-1" class="form-control">
                </div>
            </div>
            <div class="form-group">
                <label class="col-sm-2 control-label" for="form-field-1">
                    LEVEL USER
                </label>
                <div class="col-sm-2">
                    <?php
                    echo cmb_dinamis('id_level_user', 'tbl_level_user', 'nama_level', 'id_level_user',$user['id_level_user']);
                    ?>
                </div>
            </div>
            <div class="form-group">
                <label class="col-sm-2 control-label" for="form-field-1">
                    Foto
                </label>
                <div class="col-sm-2">
                    <input type="file" name="userfile">
                    <img src="<?php echo base_url().'uploads/foto_user/'.$user['foto']?>" width="200">
                </div>
            </div>
            <div class="form-group">
                <label class="col-sm-2 control-label" for="form-field-1">

                </label>
                <div class="col-sm-1">
                    <button type="submit" name="submit" class="btn btn-danger  btn-sm">SIMPAN</button>
                </div>
                <div class="col-sm-1">
                    <?php echo anchor('users', 'Kembali', array('class' => 'btn btn-info btn-sm')); ?>
                </div>
            </div>
            </form>
        </div>
    </div>
    <!-- end: TEXT FIELDS PANEL -->
</div>