Php 如何将此表单转换为codeigniter

我有下面的表格作为登录页面

<form action = "http://<?php echo $_SERVER['HTTP_HOST']; ?>/user/login" method = "post">
    <fieldset>
        <label for="email" class="block clearfix">
            Email Address:
            <span class="block input-icon input-icon-right">
                <input type="text" class="form-control" placeholder="Email" name="email" id = "email"/> <i class="icon-user"></i>
            </span>
        </label>
        <label for ="password" class="block clearfix">
            Password:
            <span class="block input-icon input-icon-right">
                <input type="password" name="password" id = "password" class="form-control" placeholder="Password"/> <i class="icon-lock"></i>
            </span>
        </label>
        <div class="clearfix">
            <button type="submit" class="button width-35 pull-right btn btn-sm btn-primary">
                <i class="icon-key"></i>
                Login
            </button>
        </div>
    </fieldset>
</form>

---

属性可以作为
表单输入（）调用的数组提供

如果我要重新创建您的
电子邮件
文本框：


我将其创建为：

$data = array(

'name' => 'email' , 
'id'   => 'email' ,
'class' => 'form_control' ,
'placeholder' => 'Email'

);

echo form_input($data);


电邮地址：
密码：
登录
让be感到困惑的是，您的
表单输入（$data）
不知何故位于
表单标签（）中不能将表单“转换”为框架。
<?php $attributes = array('id' => 'addsensorform'); ?>
<?php echo form_open_multipart('http://<?php echo $_SERVER['HTTP_HOST'];', $attributes); ?>
<fieldset>
    <label for="email" class="block clearfix">
        Email Address:
        <span class="block input-icon input-icon-right">
            <input type="text" class="form-control" placeholder="Email" name="email" id = "email"/> <i class="icon-user"></i>
        </span>
    </label>
    <label for ="password" class="block clearfix">
        Password:
        <span class="block input-icon input-icon-right">
            <input type="password" name="password" id = "password" class="form-control" placeholder="Password"/> <i class="icon-lock"></i>
        </span>
    </label>
    <div class="clearfix">
        <button type="submit" class="button width-35 pull-right btn btn-sm btn-primary">
            <i class="icon-key"></i>
            Login
        </button>
    </div>
</fieldset> 
<?php echo form_close(); ?>