diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1bde18a..532fe49 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@ Yii Framework 2 bootstrap extension Change Log
 2.0.7 under development
 -----------------------
 
+- Bug #157: Active status of multilevel submenu items of the `yii\bootstrap\Nav` class is determined correctly now (PowerGamer1)
 - Enh #64: Added simplified syntax for specifying `Collapse` widget `$items` (Faryshta, cebe)
 - Enh #131 Added `tabContentOptions` to set HTML attributes for 'tab-content' container in `Tabs` widget (AndrewKorpusov)
 - Enh #145: Added the ability to customize the class used to draw dropdowns in `yii\bootstrap\Nav`, `yii\bootstrapButtonDropdown` and `yii\bootstrap\Tab` widgets (PowerGamer1)
diff --git a/Nav.php b/Nav.php
index 947f604..eb41a86 100644
--- a/Nav.php
+++ b/Nav.php
@@ -106,7 +106,7 @@ class Nav extends Widget
      */
     public $dropDownCaret;
     /**
-     * @var string name of a class to use for rendering dropdowns withing this widget. Defaults to [[Dropdown]].
+     * @var string name of a class to use for rendering dropdowns within this widget. Defaults to [[Dropdown]].
      * @since 2.0.7
      */
     public $dropdownClass = 'yii\bootstrap\Dropdown';
@@ -234,12 +234,24 @@ class Nav extends Widget
     protected function isChildActive($items, &$active)
     {
         foreach ($items as $i => $child) {
+            if (is_array($child) && !ArrayHelper::getValue($child, 'visible', true)) {
+                continue;
+            }
             if (ArrayHelper::remove($items[$i], 'active', false) || $this->isItemActive($child)) {
                 Html::addCssClass($items[$i]['options'], 'active');
                 if ($this->activateParents) {
                     $active = true;
                 }
             }
+            $childItems = ArrayHelper::getValue($child, 'items');
+            if (is_array($childItems)) {
+                $activeParent = false;
+                $items[$i]['items'] = $this->isChildActive($childItems, $activeParent);
+                if ($activeParent) {
+                    Html::addCssClass($items[$i]['options'], 'active');
+                    $active = true;
+                }
+            }
         }
         return $items;
     }
diff --git a/tests/NavTest.php b/tests/NavTest.php
index c6df667..d620ad3 100644
--- a/tests/NavTest.php
+++ b/tests/NavTest.php
@@ -272,6 +272,37 @@ EXPECTED;
     }
 
     /**
+     * @see https://github.com/yiisoft/yii2-bootstrap/issues/96
+     * @see https://github.com/yiisoft/yii2-bootstrap/issues/157
+     */
+    public function testDeepActivateParents()
+    {
+        Nav::$counter = 0;
+        $out = Nav::widget([
+            'activateParents' => true,
+            'items' => [
+                [
+                    'label' => 'Dropdown',
+                    'items' => [
+                        [
+                            'label' => 'Sub-dropdown',
+                            'items' => [
+                                ['label' => 'Page', 'content' => 'Page', 'active' => true],
+                            ],
+                        ],
+                    ],
+                ],
+            ],
+        ]);
+
+        $expected = <<<EXPECTED
+<ul id="w0" class="nav"><li class="dropdown active"><a class="dropdown-toggle" href="#" data-toggle="dropdown">Dropdown <span class="caret"></span></a><ul id="w1" class="dropdown-menu"><li class="active dropdown-submenu"><a href="#" tabindex="-1">Sub-dropdown</a><ul><li class="active dropdown-header">Page</li></ul></li></ul></li></ul>
+EXPECTED;
+
+        $this->assertEqualsWithoutLE($expected, $out);
+    }
+
+    /**
     * Mocks controller action with parameters
     *
     * @param string $controllerId