<?php
function newsletter() {
?>
<div>
<h2>Hello World Options</h2>

<form method="post" action="options.php">
<?php wp_nonce_field('update-options'); ?>

<input name="hello_world_data" type="text" id="hello_world_data"
value="<?php echo get_option('hello_world_data'); ?>" />


<p>
<input type="submit" value="<?php _e('Save Changes') ?>" />
</p>

</form>
</div>
<?php
}
add_action('wp_footer','newsletter');

?>