HIde Rss Feed Category name in wordpress

Im using wordpress 3.6, and /feed to get rss field,

I dont want to show category name in rss feed like,

<category>
    <![CDATA[ News ]]>
</category>
<category>
    <![CDATA[ A ]]>
</category>
<category>
    <![CDATA[ B ]]>
</category>
<category>
    <![CDATA[ C ]]>
</category>

In my above example “News”- is the category title and “A”,”B” and “C” – is tags related to this post.

And here I dont want to exclude “News” category in my rss feed but I want to show only “A”, “B” and “C” as category’s.

Basically I want to “hide the first category called News in my feed code”.

Can anyone please help me to fix this. Thank you in advance.