Modificar el formulario de comentarios de WordPress

comments.php

<?php 

//Filtro para modificar la estructura 
//de los campos del formulario de comentarios

add_filter( 'comment_form_defaults', 'dcms_modify_fields_form' );

function dcms_modify_fields_form( $args ){

	$commenter = wp_get_current_commenter();
	$req = get_option( 'require_name_email' );
	$aria_req = ( $req ? " aria-required='true'" : '' );


	$author = '<input placeholder="'.__( 'Name' ) . ( $req ? ' *' : '' ).'" id="author" name="author" type="text" value="' . esc_attr( $commenter['comment_author'] ) .'" size="30"' . $aria_req . ' />';
	$email 	= '<div class="fields-wrap"><input placeholder="'.__( 'Email' ) . ( $req ? ' *' : '' ).'" id="email" name="email" type="text" value="' . esc_attr(  $commenter['comment_author_email'] ) .'" size="30"' . $aria_req . ' />';
	$url 	= '<input placeholder="'.__( 'Website' ).'" id="url" name="url" type="text" value="' . esc_attr( $commenter['comment_author_url'] ) .'" size="30" /></div>';
	$comment = '<textarea placeholder="'. _x( 'Comment', 'noun' ).'" id="comment" name="comment" cols="45" rows="8" aria-required="true"></textarea>';


	$args['fields']['author']	= $author;
	$args['fields']['email']	= $email; 
	$args['fields']['url']		= $url;
	$args['comment_field'] 		= $comment;

	return $args;

}


//Filtro para modificar el orden de los campos 
//del formulario de comentarios

add_filter( 'comment_form_fields', 'dcms_modify_order_fields' );

function dcms_modify_order_fields( $fields ){

	$val = $fields['comment'];
	
	unset($fields['comment']);

	$fields += array('comment' => $val );

	return $fields;
}