How to iterate through a innserHTML data in javascript

Clash Royale CLAN TAG#URR8PPPHow to iterate through a innserHTML data in javascript
I have a variable having innerHTML data of below format. How can I iterate through this data one by one to update one value.
"<tblFields><rsdata >
<Row __RID='R0' FieldNum='0' Title='Name' Field='Name' ControlHtml='<span />
<Row __RID='R1' FieldNum='0' Title='age' Field='age' ControlHtml='<span />
<Row __RID='R2' FieldNum='0' Title=''<table width='100% class='PDS_CELLPADDING_0 PDS_CELLSPACING_0' style='border-bottom: 0px;'><tr IsNotField='1'><td style='border-bottom: 0px;'><img src='img/photo1.jpg' /></td><td style='border-bottom: 0px; padding-left: 3px;'>Outstanding Ticklers for merge report</td></tr></table>'' Field='photo' ControlHtml='<span />
<Row __RID='R3' FieldNum='0' Title='Mark1' Field='Mark1' ControlHtml='<span />
<Row __RID='R4' FieldNum='0' Title='Mark2' Field='Mark2' ControlHtml='<span />"<tblFields><rsdata >"
My requirement is Row __RID='R2' is having Title html tags of given type, which needs to convert to original html table tags(i.e, replace < and &rt; with < and > etc).
Any help will be appreciated
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