Modify Genesis author box html.

functions.php

<?php

add_filter( 'genesis_author_box', 'custom_genesis_author_box', 10, 6 );
/**
 * Callback for Genesis 'genesis_author_box' filter.
 * 
 * Change the title element from H1 to H3.  Move the gravatar to the right.
 * Make sure to adjust the css for the .author-box .avatar to align: right
 * 
 * @package Genesis
 * @category Author
 * @author Ryan Meier <rfmeier@gmail.com>
 * @link http://my.studiopress.com/snippets/author-box/
 * 
 * @param string $author_box_html the initial end result author box html
 * @param string $context the current context
 * @param string $pattern the string pattern (used in sprintf and printf)
 * @param string $gravatar the gravatar html
 * @param string $title the title
 * @param string $description the author description
 * @return string the end result author box html
 */
function custom_genesis_author_box( $author_box_html, $context, $pattern, $gravatar, $title, $description ){
  
	// if genesis 2.0+
	if ( genesis_html5() ) {
		
		$pattern  = sprintf( '<section %s>', genesis_attr( 'author-box' ) );
		
		// changed h1 to h3 and moved gravatar after the title
		$pattern .= '<h3 class="author-box-title">%s</h3>%s';
		$pattern .= '<div class="author-box-content" itemprop="description">%s</div>';
		$pattern .= '</section>';
		
	}else{	// pre genesis 2.0
		
		// changed h1 to h3 and moved gravatar after the title
		$pattern = 'single' == $context ? '<div class="author-box"><div>%s %s<br />%s</div></div>' : '<div class="author-box"><h3>%s</h3>%s<div>%s</div></div>';
		
	}
	
	// moved $gravatar after $title
	return sprintf( $pattern, $title, $gravatar, $description );
	
}