Evey events extra attendee fields generated html

evey extra attendee fields

<div class="extra-cart-field">
    <label for="firstname1">First name</label>
    <input type="text" required="" placeholder="First name" value="" name="attributes[attendee-1017013711-1-firstname]" id="firstname1">
</div>
<div class="extra-cart-field">
    <label for="lastname1">Last name</label>
    <input type="text" required="" placeholder="Last name" value="" name="attributes[attendee-1017013711-1-lastname]" id="lastname1">
</div>
<div class="extra-cart-field">
    <label for="email1">Email address</label>
    <input type="email" required="" placeholder="Email address" value="" name="attributes[attendee-1017013711-1-email]" id="email1">
</div>
<div class="extra-cart-field">
    <label for="gender1">Select Gender</label>
    <select required="" name="attributes[attendee-1017013711-1-gender]" id="gender1">
        <option value="">Select Gender</option>
        <option value="Male">Male</option>
        <option value="Female">Female</option>
    </select>
    <input type="hidden" value="select" name="attributes[attendee-1017013711-type-gender]">
    <input type="hidden" value='["Select Gender","Male","Female"]' name="attributes[attendee-1017013711-options-gender]">
</div>