Replace myCRED link with button

/**
 * Change Links to Buttons
 * @since 1.0
 * @version 1.0
 */
function mycred_pro_turn_link_into_button( $html, $atts ) {

    // Swap opening tag
    $html = str_replace( '<a', '<button', $html );

    // Swap closing tag
    $html = str_replace( '</a>', '</button>', $html );

    // Remove href="..."
    $href = 'href="' . $atts['href'] . '"';
    $html = str_replace( $href, '', $html );

    return $html;

}
add_filter( 'mycred_link', 'mycred_pro_turn_link_into_button' );