I try to add element to structure, and I want to add to this element parent ID Form code:

&lt;section class="membersTitle" &gt;
    &lt;label&gt;Date&lt;/label&gt;
    &lt;select name="fields[parent][]"&gt;
    {% set entries = craft.entries.section('order').level(1) %}
        {% for entry in entries %}
            &lt;option value="{{ entry.id }}"&gt;{{ entry.title }}&lt;/option&gt;
        {% endfor %}
    &lt;/select&gt;
&lt;/section&gt;


I want to choose Parent from list, and I want to add the element to parent.
The fields array may only contain names that represents handles in your fieldLayout but the parent attribute is a property of your object rather than a field - you can set it via parentId. You may want to inspect your CP form in order to see how you need to define attributes

&lt;section class="membersTitle" &gt;
    &lt;label&gt;Date&lt;/label&gt;
    &lt;select name="parentId"&gt;
        {% for entry in craft.entries.section('order').level(1).find() %}
            &lt;option value="{{ entry.id }}"&gt;{{ entry.title }}&lt;/option&gt;
        {% endfor %}
    &lt;/select&gt;
&lt;/section&gt;