After reading your question,I think you want to make Master Page or Layout with base style that will be contain Menu, footer and etc.
lets assume you have an html page
<html>
<head>
<title> Hello World </title>
</head>
<body>
<div id="menu">
<li><a href="#">Home</a></li>
<li><a href="#">About</a></li>
<li><a href="#">Contact</a></li>
</div>
<div id="main-content">
<!-- this is the dynamic part -->
</div>
<div id="footer">
Copy Right 2013 Hello World
</div>
</body>
</html>
you could split it into 1- header 2- menu 3- main content 4- footer
you basically put
<html>
<head>
<title> Hello World </title>
</head>
<body>
in one view called "view_header" then you put
<div id="menu">
<li><a href="#">Home</a></li>
<li><a href="#">About</a></li>
<li><a href="#">Contact</a></li>
</div>
<div id="main-content">
in a view called "view_menu" and then you put
</div>
<div id="footer">
Copy Right 2013 Hello World
</div>
</body>
</html>
in a view called "view_footer" then in your controller
$this->load->view('view_header');
$this->load->view('view_menu');
$this->load->view('YOUR_VIEW');
$this->load->view('view_footer');
The other solution, which I see is better: create a view called view_template_1.php
<html>
<head>
<title> Hello World </title>
</head>
<body>
<div id="menu">
<li><a href="#">Home</a></li>
<li><a href="#">About</a></li>
<li><a href="#">Contact</a></li>
</div>
<div id="main-content">
<?php $this->load->view($content); ?>
</div>
<div id="footer">
Copy Right 2013 Hello World
</div>
</body>
</html>
in the controller lets say you want to call a view called About
$data = array('content'=>'about');
$this->load->view('view_template',$data);
Reference