update links

Author: nayafia

docs/examples/post_links.md

@@ -2,9 +2,9 @@
 
 This example covers posting a link to the current user's timeline using the Graph API and Facebook SDK for PHP.
 
-It assumes that you've already obtained an access token from one of the helpers found [here](/docs/php/sdk_reference#helpers). The access token must have the `publish_actions` permission for this to work.
+It assumes that you've already obtained an access token from one of the helpers found [here](../reference.md). The access token must have the `publish_actions` permission for this to work.
 
-For more information, see the documentation for [`Facebook\Facebook`](/docs/php/Facebook), [`Facebook\FacebookResponse`](/docs/php/FacebookResponse), [`Facebook\GraphNodes\GraphNode`](/docs/php/GraphNode), [`Facebook\Exceptions\FacebookSDKException`](/docs/php/FacebookSDKException) and [`Facebook\Exceptions\FacebookResponseException`](/docs/php/FacebookResponseException).
+For more information, see the documentation for [`Facebook\Facebook`](../reference/Facebook.md), [`Facebook\FacebookResponse`](../reference/FacebookResponse.md), [`Facebook\GraphNodes\GraphNode`](../reference/GraphNode.md), [`Facebook\Exceptions\FacebookSDKException`](../reference/FacebookSDKException.md) and [`Facebook\Exceptions\FacebookResponseException`](../reference/FacebookResponseException.md).
 
 ## Example