diff --git a/README.md b/README.md
index 39d0cd6..c39f585 100644
--- a/README.md
+++ b/README.md
@@ -51,10 +51,10 @@ class MainMenu extends \Tatter\Menus\Menu
 	public function get(): string
 	{
 		return $this->builder
-			->link('/', 'Home')
-			->link('/about', 'About')
+			->link(site_url('/'), 'Home')
+			->link(site_url('/about'), 'About')
 			->html('<hr>')
-			->link('/contact', 'Contact')
+			->link(site_url('/contact'), 'Contact')
 			->render();
 	}
 }
@@ -68,6 +68,11 @@ class FruitMenu extends \Tatter\Menus\Menu
 }
 ```
 
+Note: `$builder` is initialized with "set active" to the current URL. You may call `setActive()`
+again to remove or change the active menu item. Due to a limitation in `Spatie\Menu` with mixing
+relative and absolute URLs you must supply full URL values (e.g. with `site_url()`) to your
+`Menu` if you want to use this default "active" URL.
+
 ### Deploying
 
 Since `Menu->get()` returns a `string` it can be used in your view or layout files as is.
diff --git a/src/Menu.php b/src/Menu.php
index ebcc75b..4d0b30f 100644
--- a/src/Menu.php
+++ b/src/Menu.php
@@ -2,7 +2,6 @@
 
 use CodeIgniter\HTTP\URI;
 use Spatie\Menu\Menu as BaseMenu;
-use Tatter\Menus\Interfaces\MenuInterface;
 
 /**
  * Menu Class
@@ -22,21 +21,33 @@ abstract class Menu
 	/**
 	 * Initializes the Spatie Menu and
 	 * sets the current URL to be "active".
+	 * Calls any additional functions
+	 * from traits.
 	 *
 	 * @param BaseMenu|null $builder
 	 */
     public function __construct(BaseMenu $builder = null)
     {
-    	$this->builder = $builder ?? BaseMenu::new()->setActive(
-    		current_url(true)->getPath(),
-    		(new URI(base_url()))->getPath() ?? '/'
-    	);
+		$this->builder = $builder ?? BaseMenu::new()->setActive(
+			current_url(),
+			(new URI(base_url()))->getPath() ?? '/'
+		);
+
+		foreach (class_uses_recursive($this) as $trait)
+		{
+			$method = 'apply' . class_basename($trait);
+
+			if (method_exists($this, $method))
+			{
+				$this->$method();
+			}
+		}
 	}
 
 	/**
 	 * Returns the underlying Spatie Menu.
 	 */
-    public function builder(): BaseMenu
+	public function builder(): BaseMenu
     {
     	return $this->builder;
 	}
diff --git a/src/Traits/Bootstrap.php b/src/Traits/Bootstrap.php
new file mode 100644
index 0000000..14635a4
--- /dev/null
+++ b/src/Traits/Bootstrap.php
@@ -0,0 +1,22 @@
+<?php namespace Tatter\Menus\Traits;
+
+use Spatie\Menu\Link;
+
+/**
+ * Bootstrap Styler Trait
+ *
+ * Applies CSS classes & styles
+ * to make a Bootstrap-style Menu.
+ *
+ * @mixin \Tatter\Menus\Menu
+ */
+trait Bootstrap
+{
+	protected function applyBootstrap(): void
+    {
+		$this->builder->registerFilter(function (Link $link) {
+			$link->addParentClass('nav-item');
+			$link->addClass('nav-link');
+		});
+	}
+}
diff --git a/tests/_support/MenusTestCase.php b/tests/_support/MenusTestCase.php
index c482d70..782ca55 100644
--- a/tests/_support/MenusTestCase.php
+++ b/tests/_support/MenusTestCase.php
@@ -1,7 +1,10 @@
 <?php namespace Tests\Support;
 
 use CodeIgniter\Config\Factories;
+use CodeIgniter\HTTP\URI;
 use CodeIgniter\Test\CIUnitTestCase;
+use Config\App;
+use Config\Services;
 use Tatter\Menus\Config\Menus as MenusConfig;
 use Tests\Support\Menus\NotMenu;
 use Tests\Support\Menus\TestMenu;
@@ -19,6 +22,18 @@ protected function setUp(): void
 	{
 		parent::setUp();
 
+		// Use some standard settings that affect URLs
+		$config = new App();
+		$config->baseURL   = 'http://example.com';
+		$config->indexPage = '';
+		Factories::injectMock('config', 'App', $config);
+
+		// Set a current URL for checking "active" links
+		$request      = Services::request();
+		$request->uri = new URI(site_url('current'));
+		Services::injectMock('request', $request);
+
+		// Create some Menu aliases for testing
 		$config          = new MenusConfig();
 		$config->aliases = [
 			'test' => TestMenu::class,
diff --git a/tests/menu/MenuTest.php b/tests/menu/MenuTest.php
index c19b011..37f0441 100644
--- a/tests/menu/MenuTest.php
+++ b/tests/menu/MenuTest.php
@@ -1,7 +1,5 @@
 <?php namespace Tests\Support;
 
-use CodeIgniter\HTTP\URI;
-use Config\Services;
 use Spatie\Menu\Menu as BaseMenu;
 use Tatter\Menus\Menu;
 use Tests\Support\MenusTestCase;
@@ -21,17 +19,13 @@ protected function setUp(): void
 	{
 		parent::setUp();
 
-		$request      = Services::request();
-		$request->uri = new URI('http://example.com/bulgar');
-		Services::injectMock('request', $request);
-
 		$this->menu = new class extends Menu {
 
 			public function get(): string
 			{
 				return $this->builder
-					->link('/', 'Home')
-					->link('/bulgar', 'Grain')
+					->link(site_url('/'), 'Home')
+					->link(site_url('/current'), 'Grain')
 					->render();
 			}
 		};
@@ -46,7 +40,7 @@ public function testGetBuilder()
 
 	public function testUsesBuilder()
 	{
-		$menu = new class(BaseMenu::new()->link('/home', 'asparagus')) extends Menu {
+		$menu = new class(BaseMenu::new()->link(site_url('/home'), 'asparagus')) extends Menu {
 
 			public function get(): string
 			{
@@ -56,12 +50,12 @@ public function get(): string
 
 		$result = $menu->get();
 
-		$this->assertSame('<ul><li><a href="/home">asparagus</a></li></ul>', $result);
+		$this->assertSame('<ul><li><a href="http://example.com/home">asparagus</a></li></ul>', $result);
 	}
 
 	public function testGetUsesCurrentUrl()
 	{
-		$expected = '<ul><li><a href="/">Home</a></li><li class="active exact-active"><a href="/bulgar">Grain</a></li></ul>';
+		$expected = '<ul><li><a href="http://example.com/">Home</a></li><li class="active exact-active"><a href="http://example.com/current">Grain</a></li></ul>';
 		$result   = $this->menu->get();
 
 		$this->assertSame($expected, $result);
diff --git a/tests/menu/TraitsTest.php b/tests/menu/TraitsTest.php
new file mode 100644
index 0000000..a87ab06
--- /dev/null
+++ b/tests/menu/TraitsTest.php
@@ -0,0 +1,29 @@
+<?php namespace Tests\Support;
+
+use Tatter\Menus\Menu;
+use Tatter\Menus\Traits\Bootstrap;
+use Tests\Support\MenusTestCase;
+
+class TraitsTest extends MenusTestCase
+{
+	public function testBootstrapAppliesClasses()
+	{
+		$menu = new class extends Menu {
+
+			use Bootstrap;
+
+			public function get(): string
+			{
+				return $this->builder
+					->link(site_url('/'), 'Home')
+					->link(site_url('/current'), 'Grain')
+					->render();
+			}
+		};
+
+		$result = $menu->get();
+
+		$this->assertStringContainsString('li class="nav-item"', $result);
+		$this->assertStringContainsString('class="nav-link"', $result);
+	}
+}