<a class="btn btn-default ui-select-match"
   ng-hide="$select.open"
   ng-class="{'text-success': $select.selected == undefined}"
   ng-disabled="$select.disabled"
   ng-click="$select.activate()">
  <span ng-hide="$select.selected" class="text-muted">{{placeholder}}</span>
  <span ng-show="$select.selected" ng-transclude></span>
  <span class="caret"></span>
</a>

<a class="btn btn-default ui-select-match"
   ng-hide="$select.open"
   ng-class="{'text-success': $select.selected == undefined}"
   ng-disabled="$select.disabled"
   ng-click="$select.activate()">
  <span ng-hide="$select.selected" class="text-muted">{{$select.placeholder}}</span>
  <span ng-show="$select.selected" ng-transclude></span>
  <span class="caret"></span>
</a>

Fix placeholder with Bootstrap theme
Fix placeholder with Bootstrap theme
