Add target=_blank to WordPress Author Profile Bio / Description in category: http://digitizor.com/add-target-blank-author-wp/

gistfile1.txt

// http://digitizor.com/add-target-blank-author-wp/

add_filter( 'get_the_author_description', 'amtf_target_blank_author_desc' );
/**
 * Add target _blank to links in author description
 * Drop-in fix (workaround) for: https://core.trac.wordpress.org/ticket/12056
 */
function amtf_target_blank_author_desc( $desc ) {
	return str_replace( '<a', '<a target="_blank" ', $desc );
}