Having trouble pulling titles from another channel into a sidebar

Question

This is what I currently have, Ive only been using ee for about 1.5 wks so I'm pretty sure I can't do what I am below. The index and and practice_dangers templates are in the same folder group but had to be in two different channels. Any help is appreciated.

{exp:channel:entries channel="aop" disable="pagination|categories|member_data" dynamic="no"}
<li><a href="{url_title_path='practice_area/index'}">{title}</a>
    <ul>
        {exp:channel:entries channel="practice_dangers" dynamic="no" disable="pagination|categories|member_data"}
        <li>
            <a href="{url_title_path='practice_area/practice_dangers'}">{title}</a>
        </li>
        {/exp:channel:entries}
    </ul>
</li>
{/exp:channel:entries}

Answer 1

You can't have a exp:channel:entries tag inside itself, from your comment above it looks like you're using relationships. You should be using the appropriate tags to pull in the related entries. Replace relationship_field with your actual relationship field_name

{exp:channel:entries channel="aop" disable="pagination|categories|member_data" dynamic="no"}
<li>
    <a href="{url_title_path='practice_area/index'}">{title}</a>
    <ul>
        {relationship_field}
        <li>
            <a href="{relationship_field:url_title_path='practice_area/practice_dangers'}">
                {relationship_field:title}
            </a>
        </li>
        {/relationship_field}
    </ul>
</li>
{/exp:channel:entries}

You can read more about relationships here.