Elgg-Lorea-Hydra/mod/developers/views/default/theme_sandbox/navigation/horizontal.php

<?php 

$params = array();
$params['menu'] = array();
$params['menu']['default'] = array();
for ($i=1; $i<=5; $i++) {
	$params['menu']['default'][] = new ElggMenuItem($i, "Page $i", "#");
}
$params['menu']['default'][2]->setSelected(true);
$params['class'] = 'elgg-menu-hz';

echo elgg_view('navigation/menu/default', $params);