maintenance/application/admin/view/department/admin/principal.html

<form id="edit-form" class="form-horizontal form-ajax" role="form" data-toggle="validator" method="POST" action="">
    {:token()}
    <div class="form-group">
        <label class="control-label col-xs-12 col-sm-2">{:__('Department')}:</label>
        <div class="col-xs-12 col-sm-8">
            {:build_select('department_id[]', $departmentdata, $department_ids, ['class'=>'form-control selectpicker', 'multiple'=>'false'])}
            <span class="text-gray">{:__('You can select multiple departments to assign the person in charge. If you do not join the Department, you will join')}</span>
        </div>
    </div>
    <div class="form-group">
        <label for="username" class="control-label col-xs-12 col-sm-2">{:__('Username')}:</label>
        <div class="col-xs-12 col-sm-8">
            <input type="text" class="form-control" value="{$row.username|htmlentities}" disabled  />
        </div>
    </div>
    <div class="form-group">
        <label for="nickname" class="control-label col-xs-12 col-sm-2">{:__('Nickname')}:</label>
        <div class="col-xs-12 col-sm-8">
            <input type="text" class="form-control"  value="{$row.nickname|htmlentities}"  disabled />
        </div>
    </div>

    <div class="form-group hidden layer-footer">
        <label class="control-label col-xs-12 col-sm-2"></label>
        <div class="col-xs-12 col-sm-8">
            <button type="submit" class="btn btn-success btn-embossed disabled">{:__('OK')}</button>
            <button type="reset" class="btn btn-default btn-embossed">{:__('Reset')}</button>
        </div>
    </div>
</form>