Allow customization of the dropdown caret

This can be useful when another iconset is used for example.

CHANGELOG.md

@@ -6,6 +6,7 @@ Yii Framework 2 bootstrap extension Change Log
 
 - Bug #5984: `yii\bootstrap\Activefield::checkbox()` caused browser to link label to the wrong input (cebe)
 - Enh #7633: Added `ActionColumn::$buttonOptions` for defining HTML options to be added to the default buttons (cebe)
+- Enh: Added `Nav::$dropDownCaret` to allow customization of the dropdown caret symbol (cebe)
 
 
 2.0.3 March 01, 2015

Nav.php

@@ -93,6 +93,12 @@ class Nav extends Widget
      * @see isItemActive
      */
     public $params;
+    /**
+     * @var string this property allows you to customize the HTML which is used to generate the drop down caret symbol,
+     * which is displayed next to the button text to indicate the drop down functionality.
+     * Defaults to `null` which means `<b class="caret"></b>` will be used. To disable the caret, set this property to be an empty string.
+     */
+    public $dropDownCaret;
 
 
     /**
@@ -107,6 +113,9 @@ class Nav extends Widget
         if ($this->params === null) {
             $this->params = Yii::$app->request->getQueryParams();
         }
+        if ($this->dropDownCaret === null) {
+            $this->dropDownCaret = Html::tag('b', '', ['class' => 'caret']);
+        }
         Html::addCssClass($this->options, 'nav');
     }
 
@@ -166,7 +175,9 @@ class Nav extends Widget
             $linkOptions['data-toggle'] = 'dropdown';
             Html::addCssClass($options, 'dropdown');
             Html::addCssClass($linkOptions, 'dropdown-toggle');
-            $label .= ' ' . Html::tag('b', '', ['class' => 'caret']);
+            if ($this->dropDownCaret !== '') {
+                $label .= ' ' . $this->dropDownCaret;
+            }
             if (is_array($items)) {
                 if ($this->activateItems) {
                     $items = $this->isChildActive($items, $active);