title: WooCommerce - Customize shipping address fields
body: <p>I'm customizing the shipping address fields of my WooCommerce site. 
  I already change those fields in the order I want. Now I want to change the City field and instead of a text field use a select. 
  This new select for city will only show the cities from the state previously selected. Something similar to the way country and state fields work: when I select a country just the states from that country are shown in the State field.
  I want to achieve the same but with State and City. Need javascript?</p>
  
  <p>I already search core code but I couldn't find anything.</p>
  
  <p>thanks    </p>