Example that shows how to add some headings between ticket selector rows. Requires WordPress + Event Espresso 4.

ticket_headings.php

<?php
//* Please do NOT include the opening php tag, except of course if you're starting with a blank file

add_action( 'wp_enqueue_scripts', 'my_ee_add_ticket_row_headings', 11 );
function my_ee_add_ticket_row_headings() {
  wp_add_inline_script( 
    'ticket_selector',
    'jQuery( document ).ready(function($) {
      $(".ee-ticket-day-1-conference-only-registration-earlybird")
      .before( "<tr><td colspan=\'3\'><h3>Registration</h3></td></tr>" );
      $(".ee-ticket-additional-welcome-event-ticket-earlybird")
      .before( "<tr><td colspan=\'3\'><h3>Social Events</h3></td></tr>" );
    } );'
  );
}

HI Josh,

Is this the title of the ticket? url slug?
$(".ee-ticket-day-1-conference-only-registration-earlybird")

I'm trying to add row in between my tickets and cant get them to display.

I added the snippet you provided to my functions.php and modified the h3 and slug, but still not working.

Am I missing something?