$form->field($model, 'text')->widget(
\icron\simplemde\Widget::className(),
[
'options' => [
'toolbar' => null,
]
]
);Update custom options
var simple = $('<inputID>').data('simpleMDE');
simple.options['renderingConfig'] = {codeSyntaxHighlighting: true};
simple.options['toolbar'] = ['bold', 'italic'];
simple.createToolbar();