Drupal - Render Variables

To render a variable from template file to specific tpl tile, you need to declare the variable first in template file

<?php

function ipod_process_page(&$variables){

    $variables['content'] = array(

        '#markup' => '<div id="content">Content Here</div>';

        '#weight' => 100,

    );

}

Then on page.tpl.php, do

<div id="page">

    <?php print render($content);?>

</div>

Drupal - Render Variables