codecanyon-14047619.php

<?php

add_filter( "adverts_form_load", "my_adverts_form_load" );
function my_adverts_form_load( $form ) {
  if( $form['name'] != "advert" ) {
    return $form;
  }
  foreach( $form["field"] as $key => $field ) {

    if( in_array($field["name"], array("adverts_price", "adverts_location", "adverts_phone") ) ) {
        $form["field"][$key]["is_required"] = true;
        if(!is_array($form["field"][$key]["validator"])) {
            $form["field"][$key]["validator"] = array();
        }
        $form["field"][$key]["validator"][] = array( "name" => "is_required" );
    }

    if( $field["name"] == "adverts_location" ) {
         $form["field"][$key]["type"] = "adverts_field_select";
         $form["field"][$key]["max_choices"] = 1;
         $form["field"][$key]["options"] = array(
            array("value"=>"1", "text"=>"One"),
            array("value"=>"2", "text"=>"Two"),
         );
    }

  }
  return $form;
}