Hi
Please have a look at this community article :
Link:-http://freakyrajput.blogspot.in/2015/07/remove-p-tag-from-rte-in-aem.html [Not Tested on AEM 6.1 but it should work]
// Remove p tag from RTE in AEM
You can keep the RTE from surrounding your text with <p> tags by setting the removeSingleParagraphContainer property to true as long as you only create one paragraph.
With Chrome on Mac OS X (at least), holding shift while pressing enter inserts line breaks instead of paragraph breaks so you can still create text with multiple lines.
<rtePlugins jcr:primaryType="nt:unstructured">
...
</rtePlugins>
<htmlRules jcr:primaryType="nt:unstructured">
<docType jcr:primaryType="nt:unstructured">
...
</docType>
<blockHandling
jcr:primaryType="nt:unstructured"
removeSingleParagraphContainer="{Boolean}true"/>
</htmlRules>
Reference Forum Post:- http://help-forums.adobe.com/content/adobeforums/en/experience-manager-forum/adobe-experience-manager.topic.html/forum__atee-hi_i_need_torem.html
// rte remove tag p
Try this, if this comes to you as some rescue. Else i will try to get some RTE Expert to help you on this./
~kautuk