I've drawn up a simple example of how to do it in PHP. What you need to do is append a file name to the end of your links. I.e:
index.php?file=filename.html
This will display the file with that name insdie a div. You'll need to change the HTML to suit.
<?php
/* directory containing uploaded text */
$dir = '.';
/* default file */
$default = '';
/* check to see if a file name was supplied */
if (isset($_GET['file'])) {
$file = get_magic_quotes_gpc()?stripslashes($_GET['file']):$_GET['file'];
} else {
$file = $default;
}
$path = $dir . DIRECTORY_SEPARATOR . $file;
$content = '';
if (strspn($file, '/\\') > 0) {
/* check for any invalid characters */
$error = 'Invalid File Name';
} else if (! file_exists($path)) {
/* check the file exists */
$error = 'Invalid File Name';
} else if ($file != '') {
/* all is ok so get the file NB: any HTML will be parsed by the browser */
$content = @file_get_contents($path);
}
?>
<html>
<head>
<title>Text Display</title>
</head>
<body>
<ul>
<li><a href="<?php echo($_SERVER['PHP_SELF']) ?>?file=file1.html">Link To Div</a></li>
</ul>
<p><?php echo(@$error) ?></p>
<div>
<?php echo($content) ?>
</div>
</body>
</html>