Custom Post Format

custom-post-format.php

<?php
/**
 * Rename Aside post format to Look post format
 */
function rtp_rename_post_formats( $safe_text ) {
    if ( $safe_text == __( 'Aside' , 'fab' ) ) {
        return __( 'Look' , 'fab' );
    }

    return $safe_text;
}

add_filter( 'esc_html', 'rtp_rename_post_formats' );

/**
 * Rename Aside in posts list table
 */
function rtp_live_rename_formats() {
    global $current_screen;

    if ( $current_screen->id == 'edit-post' ) { ?>
        <script type="text/javascript">
            jQuery( 'document' ).ready(function() {
                jQuery( 'span.post-state-format' ).each( function() {
                    if ( jQuery(this).text() == <?php _e( 'Aside' , 'fab' ); ?> )
                        jQuery(this).text( <?php _e( 'Look' , 'fab' ); ?> );
                } );

            } );
        </script>
        <?php
    }
}

add_action( 'admin_head', 'rtp_live_rename_formats' );

/**
 * Adds custom classes to the array of body classes.
 *
 * @param array $classes Classes for the body element.
 * @return array
 */
function fab_look_body_classes( $classes ) {

    foreach ( $classes as $key => $value ) {
        if ( $value == 'single-format-aside' ) {
            unset( $classes[ $key ] );
            $classes[] = 'single-format-look';
        }
    }

    return $classes;
}

add_filter( 'body_class', 'fab_look_body_classes' );

/**
 * Update aside class to look class of post classes.
 *
 * @param array $classes Classes for the post element.
 * @return array
 */
function fab_post_classes( $classes ) {
    foreach ( $classes as $key => $value ) {
        if ( $value == 'format-aside' ) {
            unset( $classes[ $key ] );
            $classes[] = 'format-look';
        }

        if ( $value == 'post_format-post-format-aside' ) {
            unset( $classes[ $key ] );
            $classes[] = 'post_format-post-format-look';
        }
    }

    return $classes;
}

add_filter( 'post_class', 'fab_post_classes' );

/**
 * Remove post format support for post type post
 */
function rtp_remove_support() {
    remove_post_type_support( 'post', 'post-formats' );
}
?>