I found this html for add_filter menu:
<li class="dropdown" style="float:right">
<a class="dropdown-toggle" data-toggle="dropdown" href="#">
Add filter
<b class="caret"></b>
</a>
<ul class="dropdown-menu" id="filters" style="left:auto; right:0;">
<li>
<a data-field-label="Title" data-field-name="title" data-field-options="" data-field-type="string" data-field-value="" href="#">Title</a>
</li>
<li>
<a data-field-label="Book type" data-field-name="book_type" data-field-options="" data-field-type="string" data-field-value="" href="#">Book type</a>
</li>
<li>
<a data-field-label="Category" data-field-name="category" data-field-options="" data-field-type="belongs_to_association" data-field-value="" href="#">Category</a>
</li>
<li>
<a data-field-label="Detail" data-field-name="detail" data-field-options="" data-field-type="text" data-field-value="" href="#">Detail</a>
</li>
</ul>
</li>

When I click on Add Filter the console logs:
Uncaught TypeError: Object [object Object] has no method 'tooltip'
- When I create a new empty project and install rails_admin gem, it works.
- My project is using bootstrap for css and js.
Please give me some advice for this issue.
Oh, Sorry for noise, I has found out my problem
The gem twister-bootstrap-rails isn’t compatible with rails_admin. Just remove this line in GEMFILE, then rake assets:clean, and finally run bundle again, the javascript worked.
My answer is found at Github