Cauta linia:
<?php wp_nav_menu( array( 'theme_location' => 'primary', 'container' => false, 'menu_class' => 'sf-menu', 'fallback_cb' => 'revert_wp_menu_page','walker' => new Custom_Description_Walker )); ?> <?php } ?>
Si adauga:
<div align="right">
<form action="/cautare/" method="get">
<input type="text" name="q" class="search">
<input type="submit" style="background:#D8E6EB;border:0;color:#474747" value="caută">
</form>
</div>
Dupa <?php } ?> si inainte de </div>.
Uite cum s-a facut: http://i45.tinypic.com/2b2mw1.png