CKEditor custom data filtering

gistfile1.js

CKEDITOR.replace( 'editor1',
  {
	  on :
	  {
		  'pluginsLoaded' : function( evt )
			  {
				  // Disallow all heading elements.
				  evt.editor.dataProcessor.dataFilter.addRules(
						  {
							  elements :
							  {
								  $ : function( element )
								  {
									  if ( /h\d/.exec( element.name ) )
										  return false;
								  }
							  }
						  } );
			  }
	  }
  } );