form_login.php

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <title>Login SIMS v1.0</title>
  <!-- Tell the browser to be responsive to screen width -->
  <meta content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" name="viewport">
  <!-- Bootstrap 3.3.6 -->
  <link rel="stylesheet" href="<?php echo base_url()."assets/bootstrap/css/bootstrap.min.css" ?>">
  <!-- Font Awesome -->
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.5.0/css/font-awesome.min.css">
  <!-- Ionicons -->
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/ionicons/2.0.1/css/ionicons.min.css">
  <!-- Theme style -->
  <link rel="stylesheet" href="<?php echo base_url()."assets/dist/css/AdminLTE.min.css" ?>">
  <!-- iCheck -->
  <link rel="stylesheet" href="<?php echo base_url()."assets//plugins/iCheck/square/blue.css"?>">

  <!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
  <!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
  <!--[if lt IE 9]>
  <script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
  <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
  <![endif]-->
</head>
<body class="hold-transition login-page">
<div class="login-box">
  <div class="login-logo">
    <a href="../../index2.html"><b>Halaman </b>Login</a>
  </div>
  <!-- /.login-logo -->
  <div class="login-box-body">
    <p class="login-box-msg">Silahkan Login Dahulu</p>
    <?php
    if(isset($_POST['masuk'])){
      $u = $this->input->post('usr');
      $p = $this->input->post('pwd');
      $this->db_model->getLoginData($u,$p);
    }
    ?>
    <form action="" method="post">
      <div class="form-group has-feedback">
        <input type="text" class="form-control" name="usr" placeholder="Masukkan Username">
        <span class="glyphicon glyphicon-envelope form-control-feedback"></span>
      </div>
      <div class="form-group has-feedback">
        <input type="password" class="form-control" name="pwd" placeholder="Masukkan Password">
        <span class="glyphicon glyphicon-lock form-control-feedback"></span>
      </div>
      <div class="row">
        <div class="col-xs-8">
          &nbsp;
        </div>
        <!-- /.col -->
        <div class="col-xs-4">
          <button type="submit" name="masuk" class="btn btn-primary btn-block btn-flat">Sign In</button>
        </div>
        <!-- /.col -->
      </div>
    </form>
    <p>&nbsp;</p>
    <center>
    <p>*) silahkan gunakan username dan password anda untuk mengakses halaman SIMS v1.0</p></center>
  </div>
  <!-- /.login-box-body -->
</div>
<!-- /.login-box -->

<!-- jQuery 2.2.3 -->
<script src="<?php echo base_url()."assets/plugins/jQuery/jquery-2.2.3.min.js"?>"></script>
<!-- Bootstrap 3.3.6 -->
<script src="<?php echo base_url()."assets/bootstrap/js/bootstrap.min.js"?>"></script>
<!-- iCheck -->
<script src="<?php echo base_url()."assets/plugins/iCheck/icheck.min.js"?>"></script>
<script>
  $(function () {
    $('input').iCheck({
      checkboxClass: 'icheckbox_square-blue',
      radioClass: 'iradio_square-blue',
      increaseArea: '20%' // optional
    });
  });
</script>
</body>
</html>