Merge pull request #3861 from klevron/temp

Fix links [skip ci]

docs/guide/intro-upgrade-from-v1.md

@@ -270,7 +270,7 @@ be applied to any view file, even a view rendered outside of the context of a co
 Also, there is no more `CThemeManager` component. Instead, `theme` is a configurable property of the `view`
 application component.
 
-Please refer to the [Theming](tutorial-theming.md) section for more details.
+Please refer to the [Theming](output-theming.md) section for more details.
 
 
 Console Applications
@@ -493,7 +493,7 @@ the same goal.
 ]
 ```
 
-Please refer to the [Url manager docs](url.md) section for more details.
+Please refer to the [Url manager docs](runtime-url-handling.md) section for more details.
 
 Using Yii 1.1 and 2.x together
 ------------------------------

docs/guide/start-installation.md

@@ -2,7 +2,7 @@ Installing Yii
 ==============
 
 You can install Yii in two ways, using [Composer](http://getcomposer.org/) or by downloading an archive file.
-The former is the preferred way, as it allows you to install new [extensions](structure-extensions.md) or update Yii by simply running a single command.
+The former is the preferred way, as it allows you to install new [extensions](extend-creating-extensions.md) or update Yii by simply running a single command.
 
 > Note: Unlike with Yii 1, standard installations of Yii 2 results in both the framework and an application skeleton being downloaded and installed.