How to change boostrap seach button class from btn-default to btn-primary? I'd like to change the class from btn-default to btn-primary like says in here: http://getbootstrap.com/css/#buttons

&lt;!-- Standard button --&gt;
&lt;button type="button" class="btn btn-default"&gt;Default&lt;/button&gt;

&lt;!-- Provides extra visual weight and identifies the primary action in a set of buttons --&gt;
&lt;button type="button" class="btn btn-primary"&gt;Primary&lt;/button&gt;
Copy /sites/all/themes/bootstrap/theme/bootstrap/bootstrap-search-form-wrapper.func.php

to 

/sites/all/themes/my-bootstrap-subtheme/templates

and edit that file at line 14:

 $output .= '&lt;button type="submit" class="btn btn-default"&gt;';


to:

 $output .= '&lt;button type="submit" class="btn btn-primary"&gt;';


This might be helpful:
https://drupal.org/node/225125