target="_blank" for primary links on reflection template

I succeded in open primary links on a new browser windows (Reflection Theme)

my code on the /var/www/themes/reflection/page.tpl.php file was like this:

<ul id="primary">
<?php foreach ($primary_links as $link): ?>
<?php $i=$i+1; ?>
<?php if ($i==count($primary_links)) print ('<li class="last">');
else print ('<li>');
?>
<?php
print $link ?></li>
<?php endforeach; ?>
</ul>

i added this code on the second line of the above mentioned code ( i mean after <ul id="primary">)

<?php $primary_links = str_replace( 'href', 'target="_blank" href', $primary_links); ?>

and that's it. I hope to help somebody.