Following is my code.
<fields name="request">
<fieldset name="request">
<field name="format" type="list" label="COM_CPS_FIELD_FORMAT"
description="COM_CPS_FIELD_FORMAT_DESC" class="small"
default="raw"
>
<option value="">COM_CPS_FORMAT_HTML</option>
<option value="raw">COM_CPS_FORMAT_RAW</option>
</field>
</fieldset>
</fields>
When I save the menu with 2nd option it save the url like this index.php?option=com_cps&view=webservice&format=raw
but when I save the menu with first option it does not remove the &format=raw
If any one can help me out It would be great.