open your config.xml file and comment below code and write new code that I am suggesting
<!-- START DEFINED BACKEND ROUTE -->
<!--admin>
<routers>
<adminhtml>
<use>admin</use>
<args>
<modules>
<colorswatch>SMDesign_Colorswatch</colorswatch>
<frontName>colorswatch</frontName>
</modules>
</args>
</adminhtml>
</routers>
</admin-->
<!-- END DEFINED BACKEND ROUTE -->
<admin>
<routers>
<colorswatch>
<use>admin</use>
<args>
<module>SMDesign_Colorswatch</module>
<frontName>colorswatch</frontName>
</args>
</colorswatch>
</routers>
</admin>
and open adminhtml.xml and write below code or create adminhtml.xml if it is not there in etc folder
<?xml version="1.0"?>
<config>
<menu>
<catalog translate="title" module="catalog">
<children>
<colorswatch translate="title" module="catalog">
<title>SMD ColorSwatch</title>
<action>colorswatch/adminhtml_colorswatch/attributes</action>
<sort_order>25</sort_order>
</colorswatch>
</children>
</catalog>
</menu>
<acl>
<resources>
<admin>
<children>
<system>
<children>
<config>
<children>
<smdesign_colorswatch translate="title" module="colorswatch">
<title>Config SMDesign Magento ColorSwatch</title>
<sort_order>50</sort_order>
</smdesign_colorswatch>
</children>
</config>
</children>
</system>
<catalog translate="title" module="catalog">
<children>
<colorswatch translate="title">
<title>SMDesign Color Swatch</title>
<children>
<swatch_attributes translate="title">
<title>Manage Attributes</title>
</swatch_attributes>
<swatch_images translate="title">
<title>Manage Attribute Images</title>
</swatch_images>
</children>
</colorswatch>
</children>
</catalog>
</children>
</admin>
</resources>
</acl>
</config>