The following example shows you how you can stop the Show on Map link from appearing beside every Doctor and Dentist displayed from NHS Choices. It will display some results such as the contact details just not an identifiable location.
Step-by-step guide
What you need to do is to locate the *Fields.xsl file that is being used to drive the My House and My Nearest pages. Check your MyHouse Options and under Paths and Watermarking you will see the XSL Path entry e.g. xml/myHouse_Fields.xsl.
The following extract from the *Fields.xsl shows how you hide the Show on map for the Dentists and Doctors map layers.
<!-- don't do for NHS CHoices -->
<xsl:if test="$mapLayers != 'Dentists' and $mapLayers != 'Doctors'">
<p>
<a>
<xsl:attribute name="href">
<xsl:choose>
<xsl:when test="$dist != -1">
<xsl:value-of select="$mapPageUrl" />?MapSource=<xsl:value-of select="$mapSource" />&amp;StartEasting=<xsl:value-of select="$e" />&amp;StartNorthing=<xsl:value-of select="$n" />&amp;StartZoom=250&amp;o=1&amp;Layers=<xsl:value-of select="$mapLayers" />
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$mapPageUrl" />?MapSource=<xsl:value-of select="$mapSource" />&amp;StartEasting=<xsl:value-of select="$e" />&amp;StartNorthing=<xsl:value-of select="$n" />&amp;StartZoom=1100&amp;o=1&amp;Layers=<xsl:value-of select="$mapLayers" />
</xsl:otherwise>
</xsl:choose>
</xsl:attribute>
<xsl:attribute name="class">atShowOnMap</xsl:attribute>Show
<xsl:choose>
<xsl:when test="contains($cur/child::node()[position()=1],'|')">
<xsl:value-of select="substring-after($cur/child::node()[position()=1],'|')"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$cur/child::node()[position()=1]"/>
</xsl:otherwise>
</xsl:choose>
on map
</a>
</p>
</xsl:if>
.......
<!--v3.4 new template to generate the Dist column-->
<xsl:template name="getDist">
<xsl:param name="cur"/>
<td>
<xsl:for-each select="$cur/child::node()[
name(.) != 'Obj'
and name(.) != 'Key'
and name(.) != 'URL'
and name(.) != 'MI_Style'
and name(.) != 'MapSpurE'
and name(.) != 'MapSpurN'
and name(.) != 'MapSpurMinE'
and name(.) != 'MapSpurMinN'
and name(.) != 'MapSpurMaxE'
and name(.) != 'MapSpurMaxN'
and name(.) != 'MapSpurX'
and name(.) != 'MapSpurY'
and name(.) != ''
]">
<xsl:choose>
<xsl:when test="name(.) = 'Distance'">
<xsl:variable name="dist" select="."/>
<xsl:variable name="e" select="$cur/child::node()[name(.) = 'MapSpurE']"/>
<xsl:variable name="n" select="$cur/child::node()[name(.) = 'MapSpurN']"/>
<xsl:if test="$dist != -1">
<p class="atDistance">
<strong>Distance: </strong>
<xsl:choose>
<xsl:when test="$dist > 1000">
<xsl:value-of select="round($dist div 1000)" />
km away
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="round($dist)" />
metres away
</xsl:otherwise>
</xsl:choose>
</p>
</xsl:if>
<!-- don't do for NHS CHoices -->
<xsl:if test="$mapLayers != 'Dentists' and $mapLayers != 'Doctors'">
<p>
<a>
<xsl:attribute name="href">
<xsl:choose>
<xsl:when test="$dist != -1">
<xsl:value-of select="$mapPageUrl" />?MapSource=<xsl:value-of select="$mapSource" />&amp;StartEasting=<xsl:value-of select="$e" />&amp;StartNorthing=<xsl:value-of select="$n" />&amp;StartZoom=250&amp;o=1&amp;Layers=<xsl:value-of select="$mapLayers" />
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$mapPageUrl" />?MapSource=<xsl:value-of select="$mapSource" />&amp;StartEasting=<xsl:value-of select="$e" />&amp;StartNorthing=<xsl:value-of select="$n" />&amp;StartZoom=1100&amp;o=1&amp;Layers=<xsl:value-of select="$mapLayers" />
</xsl:otherwise>
</xsl:choose>
</xsl:attribute>
<xsl:attribute name="class">atShowOnMap</xsl:attribute>Show <xsl:choose>
<xsl:when test="contains($cur/child::node()[position()=1],'|')">
<xsl:value-of select="substring-after($cur/child::node()[position()=1],'|')"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$cur/child::node()[position()=1]"/>
</xsl:otherwise>
</xsl:choose>
on map
</a>
</p>
</xsl:if>
</xsl:when>
<xsl:otherwise>
</xsl:otherwise>
</xsl:choose>
</xsl:for-each>
</td>
</xsl:template>
.....