Craft 2, MySQL database, Twig, JavaScript files
I have all ready created form, for parents profile that has child info. On website i need to add dropdown menu, in which is information of there children, so parents when is log on website, don't need to fill out information for children, they can choose from dropdown.


It sounds like you want to loop through the children (Entries?) and output the data as a dropdown menu...

{% set children = craft.entries.section('children').all() %}

&lt;select name="fields[children]"&gt;
    {% for child in children %}
        &lt;option value="{{ child.id }}"&gt;{{ child.title }}&lt;/option&gt;
    {% endfor %}
&lt;/select&gt;


For more information, see this thread...