Create function to generate subheader

template.php

@@ -116,11 +116,50 @@ function valencia_preprocess_html( &$variables ) {
 function valencia_preprocess_page( &$vars ) {
     // Get the entire main menu tree
     $main_menu_tree = menu_tree_all_data('main-menu');
+    // and add the active trail
+    menu_tree_add_active_path($main_menu_tree);
 
     // Add the rendered output to menu
     $vars['valencia_menu'] = menu_tree_output($main_menu_tree);
 }
 
+/**
+ * Add the active trail indicators into the tree.
+ *
+ * The data returned by menu_tree_page_data() has link['in_active_trail'] set 
+ * to TRUE for each menu item in the active trail. The data returned from 
+ * menu_tree_all_data() does not contain the active trail indicators. This is a 
+ * helper function that adds it back in.
+ *
+ * Source: 
+ * http://drupalcontrib.org/api/drupal/contributions!menu_block!menu_block.module/function/menu_tree_add_active_path/7
+ */
+function menu_tree_add_active_path(&$tree) {
+    // Grab any menu item to find the menu_name for this tree.
+    $menu_item = current($tree);
+    $tree_with_trail = menu_tree_page_data($menu_item['link']['menu_name']);
+
+    // To traverse the original tree down the active trail, we use a pointer.
+    $subtree_pointer = &$tree;
+
+    // Find each key in the active trail.
+    while ($tree_with_trail) {
+        foreach ($tree_with_trail as $key => &$value) {
+            if ($tree_with_trail[$key]['link']['in_active_trail']) {
+                // Set the active trail info in the original tree.
+                $subtree_pointer[$key]['link']['in_active_trail'] = TRUE;
+                // Continue in the subtree, if it exists.
+                $tree_with_trail = &$tree_with_trail[$key]['below'];
+                $subtree_pointer = &$subtree_pointer[$key]['below'];
+                break;
+            }
+            else {
+                unset($tree_with_trail[$key]);
+            }
+        }
+    }
+}
+
 /**
  * Choose which menu create basing on the id
  */
@@ -128,6 +167,8 @@ function valencia_links__system_main_menu($vars) {
     switch ($vars['id']) {
         case 'header':
             return valencia_header_menu($vars);
+        case 'subheader':
+            return valencia_subheader_menu($vars);
         case 'footer':
             return valencia_footer_menu($vars);
     }
@@ -154,6 +195,37 @@ function valencia_header_menu($vars) {
     return $html;
 }
 
+/** 
+ * Custom links for subheader menu
+ * Follows a custom design
+ *
+ * We need to print only the submenu of active menu
+ */
+function valencia_subheader_menu($vars) {
+    // Var with all HTML of the menu
+    $html = '<ul>';
+
+    foreach ($vars['links'] as $key => $link) {
+        // To print every menu voice only one, see Drupal API
+        if (is_numeric($key)) {
+            // Check for submenu, but only if they are of first level and this 
+            // is the active link
+            if (!empty($link['#below']) && $link['#original_link']['depth'] === '1' && $link['#original_link']['in_active_trail']) {
+                // If there is a submenu create it using the header function, 
+                // because they have the same struct
+                $sub_menu = theme('links__system_main_menu', array(
+                    'links' => $link['#below'],
+                    'id'    => 'header'
+                ));
+                $html .= $sub_menu;
+            }
+        }
+    }
+
+    $html .= '</ul>';
+    return $html;
+}
+
 /**
  * Custom links for footer menu
  * Follows http://design.ubuntu.com/web-style-guide/scaffolding#footer

tpl/page.tpl.php

@@ -98,9 +98,10 @@
         </header>
         <header class="banner global inverted" role="banner">
                 <nav class="nav-primary nav-left" role="navigation">
-                        <ul>
-                                <li><a href="#">Somewhere</a></li>
-                        </ul>
+                        <?php print theme('links__system_main_menu', array(
+                            'links' => $valencia_menu,
+                            'id'    => 'subheader'
+                        ));?>
                         <form action="/search" id="search-form" class="header-search">
                                 <input type="search" maxlength="255" name="q" id="edit-keys" class="form-text" placeholder="Cerca&hellip;" value="" />
                                 <button type="submit">