I want to replace a value in the list

```
dem = [<p class="left-text padding-left-10">
<a href="/people" class="red-text">See all people</a>
</p>, <p class="left-text padding-left-10">
<a href="/tv" class="red-text" style="display:inline;">See all bio TV</a>
<span class="divider">&nbsp;|&nbsp;&nbsp;</span>
<a href="/tv/daily-schedule" class="red-text" style="display:inline;">See schedule </a>
</p>, <p class="left-text bottom-flyout-video-padding">
<a href="/videos" class="red-text ">See all videos</a>
</p>, <p class="left-text padding-left-10">]

dem.replace('<a href','<!--')

```

This gives me an error. I know its a list. How can i replace all values of `a href` with `<!--`.