Change the “Showing Posts with Label” Show all Posts

Want to change this:
With

First things first, please backup your template.
1. Go to “Edit Html”.
2. Type Control F or Command F to find this code:

<data:navMessage/>

Replace this with:

You are browsing the <a expr:href='data:label.url' rel='tag'><data:blog.searchLabel/> </a> Category

If you want to remove it, Now find (CTRL+F) this code in the template:

<b:includable id='status-message'>
<b:if cond='data:navMessage'>
<div class='status-msg-wrap'>
<div class='status-msg-body'>
<data:navMessage/>
</div>
<div class='status-msg-border'>
<div class='status-msg-bg'>
<div class='status-msg-hidden'><data:navMessage/></div>
</div>
</div>
</div>
<div style='clear: both;'/>
</b:if>
</b:includable>

Delete the code from above and replace it with this one:

<b:includable id='status-message'>
<b:if cond='data:navMessage'>
<div>
</div>
<div style='clear: both;'/>
</b:if>
</b:includable>

Now save your template. That's all.