Fixes #130: Fixed `yii\bootstrap\Collapse` to use pure numerical value on `content` property

CHANGELOG.md

@@ -5,6 +5,7 @@ Yii Framework 2 bootstrap extension Change Log
 -----------------------
 
 - Bug #126: `yii\bootstrap\ToggleButtonGroup` was unable to work without model (makroxyz)
+- Bug #130: Fixed `yii\bootstrap\Collapse` to use pure numerical value on `content` property (meysampg)
 
 2.0.6 March 17, 2016
 --------------------

Collapse.php

@@ -144,7 +144,7 @@ class Collapse extends Widget
 
             $header = Html::tag('h4', $headerToggle, ['class' => 'panel-title']);
 
-            if (is_string($item['content']) || is_object($item['content'])) {
+            if (is_string($item['content']) || is_numeric($item['content']) || is_object($item['content'])) {
                 $content = Html::tag('div', $item['content'], ['class' => 'panel-body']) . "\n";
             } elseif (is_array($item['content'])) {
                 $content = Html::ul($item['content'], [