theme.php
<!DOCTYPE html>
<html>
<head>
<?='';//$lia->view('lia/Resources');?>
<?=$lia->getResourceHtml();?>
</head>
<body>
<header>
<h1>Header</h1>
</header>
<main>
<?=isset($lia->addons['error'])?$lia->addons['error']->headerMessage:''?>
<?=''//$lia->view('lia/Content'); ?>
<?=$content?>
</main>
<footer>
<h3>Footer</h3>
</footer>
</body>
</html>