launch new tab and refresh original page codeigniter
<form action="newpage.php" method="post" target="_blank" onsubmit="javascript: setTimeout(function(){location.reload();}, 1000);return true;">
Next Availiable ID: <input type="text" name="id" value="<?= $nextid ?>"><br/>
Your Name: <input type="text" name="thename" maxlength="64"><br/>
<button type="submit">Go!</button>
</form>