Add divi general settings theme options

divi-custom-link-options.php

/**
* add this code in functions.php child theme
*/

if ( is_admin() ) {
    add_filter( 'et_epanel_layout_data', 'mc_et_epanel_layout_data' );
}
/**
 * Hooked into the et_epanel_layout_data filter
 * Add additional social media options to the Divi Theme Options panel
 *
 * @param $options
 *
 * @return array
 */
function mc_et_epanel_layout_data( $options ) {
    // original Divi theme options
    $original_options = $options;
    // our custom options
    $new_options = array();
    // loop on original options
    foreach ( $original_options as $option ) {
    // build new options array
        $new_options[] = $option;

        if ( ! isset( $option['id'] ) ) {
            continue;
        }
        if ( 'divi_show_rss_icon' === $option['id'] ) {
            $new_options[] = array(
                    'name' => esc_html__( 'Afficher l\'icône Instagram', 'divi' ),
                    'id'   => 'show_divi_instagram',
                    'type' => 'checkbox2',
                    'desc' => esc_html__( 'Afficher l\'icône Instagram', 'divi' ),
            );
        }
        // select our option position (below existing option, here logo)
        if ( 'divi_rss_url' === $option['id'] ) {
            $new_options[] = array(
                    'name' => esc_html__( 'URL Instagram', 'divi' ),
                    'id'   => 'divi_instagram_url',
                    'type' => 'text',
                    'desc' => esc_html__( 'URL du compte Instagram', 'divi' ),
            );
        }
    }

    $options = $new_options;
    return $options;
}

/**
* add this code in includes/social_icons.php child theme
*/
// ... Divi originals icons
<?php if ( 'on' === et_get_option( 'show_divi_instagram', 'on' ) ) : ?>
    <li class="et-social-icon et-social-instagram">
        <a href="<?php echo esc_url( et_get_option( 'divi_instagram_url', '#' ) ); ?>" class="icon">
            <span><?php esc_html_e( 'Instagram', 'Divi' ); ?></span>
        </a>
    </li>
<?php endif; ?>