Frog CMS

<ul class="top-level">
<?php foreach($this->find('/')->children() as $item): ?>
<li <?php if(in_array($this->slug, explode('/', $item->url))) echo 'class="current"'; ?>><?php echo $item->link(); ?></li>
<?php if($child = $this->children()): ?>
<ul class="two-level">
<?php foreach($child as $subitem): ?>
<li <?php if(in_array($this->slug, explode('/', $subitem->url))) echo 'class="current"'; ?>><?php echo $subitem->link(); ?></li>
<?php endforeach; ?>
</ul>
<?php endif; ?>
</ul>

And then you may add 3 level.

Hm… Use $this->parent(1)->children() to get childrens of 1 level menu.

In header maybe:

<ul class="top-level">
<?php foreach($this->find('/')->children() as $item): ?>
<li <?php if(in_array($this->slug, explode('/', $item->url))) echo 'class="current"'; ?>><?php echo $item->link(); ?></li>
<?php endforeach; ?>
</ul>

In sidebar:

<?php if($child = $this->level(1)->children()): ?>
<ul class="two-level">
<?php foreach($child as $subitem): ?>
<li <?php if(in_array($this->slug, explode('/', $subitem->url))) echo 'class="current"'; ?>><?php echo $subitem->link(); ?></li>
<?php endforeach; ?>
</ul>
<?php endif; ?>
</ul>

But for this download this Frog version

See INFO/FrogCMS_0.9.5_RU1_changes.txt. Chenges are small and chenged parent() method.

Do a hidden page with slug, maybe, /other_menu/ and do another struct.

Use:

<?php foreach($this->find('/other_menu/')->children() as $item): ?> ...

My English is ugly :(