Ckeditor语法Highliterl高亮显示颜色在Codeigniter中不起作用

Question

我创建了一个带有语法高亮显示的ckeditor，它工作正常，当我在代码段中编写某些代码（无论是php代码还是其他任何语言）并单击Submit按钮时，它将向我显示简单的纯文本代码，其中代码未突出显示。我不知道为什么？这是我的代码。

<?php
    if($this->input->post('submit'))
    {
        echo $this->input->post('editor1');
    }
?>
<script type="text/javascript" src="ckeditor/ckeditor.js"></script>
<script type="text/javascript" src="ckeditor/ckfinder/ckfinder.js"></script>
<script type="text/javascript" src="ckeditor/plugins/syntaxhighlight/scripts/shCore.js"></script>
<script type="text/javascript" src="ckeditor/plugins/syntaxhighlight/scripts/shBrushCss.js"></script>
<script type="text/javascript" src="ckeditor/plugins/syntaxhighlight/scripts/shBrushJScript.js"></script>
<script type="text/javascript" src="ckeditor/plugins/syntaxhighlight/scripts/shBrushPhp.js"></script>
<script type="text/javascript" src="ckeditor/plugins/syntaxhighlight/scripts/shBrushPlain.js"></script>
<script type="text/javascript" src="ckeditor/plugins/syntaxhighlight/scripts/shBrushSql.js"></script>
<script type="text/javascript" src="ckeditor/plugins/syntaxhighlight/scripts/shLegacy.js"></script>
<link rel="stylesheet" href="ckeditor/plugins/syntaxhighlight/styles/shCoreDefault.css" />

<script>
    var editeur = CKEDITOR.replace('editor1',
    {
        toolbar: 'Basic'
    },
    {
        language: "fr"
    });
    CKFinder.setupCKEditor(editeur, '/ckfinder/');
</script>

<form method="post">
    <textarea id="editor1" name="editor1" class="col-xs-12 ckeditor"></textarea>
    <input class="btn btn-info" type="submit" name="submit" id="submit" value="Submit" />
</form>