Secondary Links Menu Tree

Are you just trying to show a secondary (and possibly tertiary) menu? The following code will create a block with a menu tree starting below the active item and the the active title as the block title.

  $mid = menu_get_active_nontask_item();
  $active = menu_get_item($mid);
  // this is a top-level link in your primary links
  if($active['pid'] == variable_get('menu_primary_menu', 0)){
    $block->subject = $active['title'];
    $block->content = theme('menu_tree',$mid);  
  }

If your primary menu structure looked like this, and you were currently on '2'

1
2
  2-1
  2-2
     2-2-1
3

then the block would look like this:

<strong>2 (Title)</strong>
2-1
2-2
   2-2-1

Hi mccaffry and rz

Thanks for this thread I am looking for a similar solution. I tried mccaffry's solution but there seems to be some problems with that:
1. the block apperas only when I click a secondary menu item. That's fine but it appears with all the items under the primary link. So if I have menu like

           1 -- 2 -- 3
           |
            - a -- b --c 
              |
               -i -- ii --iii

the block is appearing when I am clicking on "a" and its showing the block heading as "1" and all the entries inside 1 with its children and grandchildren.
(I have not expanded the primary menu. If I keep it expanded then on clicking any primary link whole primary menu comes up with title as the first secondary link.)

What I am interested in is that when I click on "a" only a's children should come in the block.

About rz's solution:
where should I write that code???

im just wondering if this would work in drupal 5 and also if it matters the blue marine theme.

A fully working solution like this for drupal 6 would be much appreciated. The code in a comment above doesn't work unfortunately (even with the suggested modification.
Everything else I need is working OK in drupal 6, I'd rather not have to go back to 5 just for a block heading :-(

None of the above solutions were really what I wanted, but they did help me figure out how to do what I wanted; have a custom block show a menu tree of sibling menu items.

Create a custom block—I titled mine 'In This Section'—and type in the following PHP code as the body of the block:

  $mid = menu_get_active_nontask_item();
  $active = menu_get_item($mid);
  if(menu_in_active_trail($mid)){
    print theme('menu_tree',$active['pid']);
  }
  else print 'Nothing.'

Hope this is helpful.

Jonathan M. Lane
OpenConcept Consulting Inc. http://www.openconcept.ca/

Based on kingandy's code I made the same block but now by writing a small custom module (name: 'secondarymenu'). IMHO this is better practice than writing php code in a block. It also gives standard theming for the block title.

The block shows the secondary menu and below of the current page. The block title is name of the corresponding primary menu item.

Below is the code for the secondarymenu.module file, I guess you can make the secondarymenu.info file yourselves.

<?php 
function secondarymenu_block($op = 'list', $delta = 0) {
  if ($op == 'list') {
    $blocks[0]['info'] = t('Secondary menu');
    return $blocks;
  }
  else if ($op == 'view') {
    $primary_menu_id = variable_get('menu_primary_menu', 0);
    if (menu_in_active_trail($primary_menu_id)){
      // Get the menu items that lead to the current menu item.
      $active_trail =_menu_get_active_trail();
      // Get the menu id of the active top-level link.
      $mid = $active_trail[1];
      
      // Use active top-level to build menu tree and block title.
      $menu_item = menu_get_item($mid);
      $data['subject'] = $menu_item['title'];
      $data['content'] = theme('menu_tree', $mid);
      return $data;
    }
  }
}
?>

-- Erik

I had a similar problem to others, I think, in that I have a tabbed menu along the top and a submenu down the side, with the submenu holding everything that isn't in the tabbed menu along the top. Of course, just displaying the secondary tier and displaying the 3rd, 4th, ... nth tiers in other areas isn't terrbily useful for me.

I wasn't getting much joy at all out of the previous solutions - probably because I misunderstood them - so I went ahead and did this fix for an intranet and I think it may or may not help someone else.

I created a function in my theme's template.php file, and called it from my other template files as appropriate. This is enough for me as it's not going to be changing anytime soon.

<?php
function phptemplate_secondary_links() {
	$output = '';
	
	$tree = menu_tree_page_data(variable_get('menu_primary_links_source', 'primary-links'));

	while ($item = array_shift($tree)) {
		if ($item['link']['in_active_trail']) {
			$tree = empty($item['below']) ? array() : $item['below'];
			break;
		}
        }

	$output .= phptemplate_sublinks($tree);
	return $output;
}

function phptemplate_sublinks($tree) {
	$output .= '<ul>';

	while($item = array_shift($tree)) {
		$class='';
		if ($item['link']['in_active_trail']) $class = ' class="active-trail"';
		if ($item['link']['hidden'] < 1) $output .= '<li><a' . $class . ' href="/' . drupal_get_path_alias($item['link']['href']) . '">' . $item['link']['title'] . '</a>';

	    if (!empty($item['below'])) {
			$output .= phptemplate_sublinks($item['below']);
	    }
		$output .= '</li>';
	}
	
	$output .= '</ul>';
	
	return $output;
}
?>

It's some simple recursion and does the trick for me. It doesn't deal with anything beyond the basics, it doesn't check against always expanded links or utilise theme related calls or anything like that, but it should be simple enough to include since everything is available in the $item array.

I'm figuring I'm going to kick myself when someone just points me to something in core that already does this, but I didn't find it my 30 minutes of looking :p

If you like you could do something very similar in a block and have it operate through Drupal's block management as appropriate.

Hope this helps someone.

Instead of the standard first-level-only secondary menu in D5/D6:
theme('links', $secondary_links)

I'm using this in D5:
theme('menu_tree', variable_get('menu_secondary_menu', 0))

And for D6:
theme('menu_tree', menu_tree('secondary-links'))

(in order to see the active sub-menu items)

Just in case people find this thread: http://drupal.org/project/menu_block is awesome!

My tertiary links are displaying below my secondary links:

<div id="secondary">
   <ul class="links">
      <li><a href="link1">Link 1</a></li>
      <li><a href="link2">Link 2</a></li>
      <li><a href="link3">Link 3</a></li>
      <li><a class="active-trail active" href="link4">Link 4</a></li>
      <li><a href="link5">Link 5</a></li>
   </ul>
</div>
<ul id="tertiary">
      <li><a href="link4a">Link 4a</a></li>
      <li><a href="link4b">Link 4b</a></li>
      <li><a href="link4c">Link 4c</a></li>
</ul>

Is there any way to display the tertiary links within the secondary links menu? (Display the children of the secondary links which are children of the primary links)

So it would be:

<div id="secondary">
   <ul class="links">
      <li><a href="link1">Link 1</a></li>
      <li><a href="link2">Link 2</a></li>
      <li><a href="link3">Link 3</a></li>
      <li><a class="active-trail active" href="link4">Link 4</a>
          <ul id="tertiary">
             <li><a href="link4a">Link 4a</a></li>
             <li><a href="link4b">Link 4b</a></li>
             <li><a href="link4c">Link 4c</a></li>
          </ul>
      </li>
      <li><a href="link5">Link 5</a></li>
   </ul>
</div>

Thanks!