In Yii 2.0 DetailView, sometime too long content will break page width, this time need set max-width to limit line width to switch one line to more lines, the template part in the follow code is the limit width code

    <?= DetailView::widget([
        'model' => $model,
        'attributes' => [
            'hp_id',
            ...
            // content too long.
            'hp_desc',
            ...
        ],
        'template' => '<tr><th>{label}</th><td style="width:90%;">{value}</td></tr>',
    ]) ?>