fixed refences

framework/helpers/BaseHtml.php

@@ -299,7 +299,7 @@ class BaseHtml
 	 * @param string $text link body. It will NOT be HTML-encoded. Therefore you can pass in HTML code
 	 * such as an image tag. If this is coming from end users, you should consider [[encode()]]
 	 * it to prevent XSS attacks.
-	 * @param array|string|null $url the URL for the hyperlink tag. This parameter will be processed by [[url()]]
+	 * @param array|string|null $url the URL for the hyperlink tag. This parameter will be processed by [[yii\helpers\Url::to()]]
 	 * and will be used for the "href" attribute of the tag. If this parameter is null, the "href" attribute
 	 * will not be generated.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
@@ -307,7 +307,7 @@ class BaseHtml
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * See [[renderTagAttributes()]] for details on how attributes are being rendered.
 	 * @return string the generated hyperlink
-	 * @see url()
+	 * @see yii\helpers\Url::to()
 	 */
 	public static function a($text, $url = null, $options = [])
 	{